Links
  • Compare ()
  • Fast Order
  • Sign In
  • Contact Us
  • Sign Up
|
Toggle Nav
Advanced Search
    • Cart 0 Shopping Cart
    Menu
    Account

    Science

    Filter
    Set Descending Direction

    12563 items

    Page
    per page
    View as Grid List
    1. 12V 200mA minature mes lamp-(ELS-LK2364)
      Code:ELS-LK2364 UOM:Each
      Overseas
      AED 23.15 AED 22.05
      Add to Wish List
      Add to Compare
    2. 12V/20W Halogen bulb-(ELS-MIC5528)
      Code:ELS-MIC5528 UOM:Each
      Overseas
      AED 111.25 AED 105.95
      Add to Wish List
      Add to Compare
    3. 15MTR Pipe Cleaner 3mmx15metres-(ELS-BRU1090)
      Code:ELS-BRU1090 UOM:Each
      Overseas
      AED 73.41 AED 69.91
      Add to Wish List
      Add to Compare
    4. 160mm polypropylene funnels natural-(ELS-FUN1260)
      Code:ELS-FUN1260 UOM:Each
      Overseas
      AED 28.43 AED 27.08
      Add to Wish List
      Add to Compare
    5. 18 tray trolley-(ELS-HP3025N)
      Code:ELS-HP3025N UOM:Each
      Overseas
      AED 6,319.29 AED 6,018.37
      Add to Wish List
      Add to Compare
    6. 1:1 transformer retractable core-(ELS-LK7483)
      Code:ELS-LK7483 UOM:Each
      Overseas
      AED 445.84 AED 424.61
      Add to Wish List
      Add to Compare
    7. 1Kb DNA ladder 250-10Kp-(ELS-ELE2352)
      Code:ELS-ELE2352 UOM:Each
      Overseas
      AED 289.82 AED 276.02
      Add to Wish List
      Add to Compare
    8. 1kg Zinc Plated Steel Mass Set-(ELS-EDU1184)
      Code:ELS-EDU1184 UOM:Each
      Overseas
      AED 63.32 AED 60.30
      Add to Wish List
      Add to Compare
    9. 1L erlen. Flask n neck-(ELS-FLA40740)
      Code:ELS-FLA40740 UOM:PK-10
      Overseas
      AED 1,293.26 AED 1,231.68
      Add to Wish List
      Add to Compare
    10. 1L erlen. Flask w neck-(ELS-FLA42580)
      Code:ELS-FLA42580 UOM:PK-10
      Overseas
      AED 1,302.69 AED 1,240.66
      Add to Wish List
      Add to Compare
    11. 1N Spring Balance-(ELS-EDU1186)
      Code:ELS-EDU1186 UOM:Each
      Overseas
      AED 18.60 AED 17.71
      Add to Wish List
      Add to Compare
    12. 1PS Phase Separator Papers 110mm (Pack 100)
      Code:EVT-VTN12300376 UOM:PK-100
      Overseas
      AED 706.81 AED 673.15
      Add to Wish List
      Add to Compare
    13. 1PS Phase Separator Papers 150mm (Pack 100)
      Code:EVT-VTN12300378 UOM:PK-100
      Overseas
      AED 1,097.34 AED 1,045.09
      Add to Wish List
      Add to Compare
    14. 1X C-mount camera adapter no lens 9999-(ELS-MIC5678)
      Code:ELS-MIC5678 UOM:Each
      Overseas
      AED 1,367.66 AED 1,302.53
      Add to Wish List
      Add to Compare
    15. 2 Blade Propeller-(ELS-EL10076)
      Code:ELS-EL10076 UOM:Each
      Overseas
      AED 15.79 AED 15.04
      Add to Wish List
      Add to Compare
    16. 2 Prong Double Adjustable Universal Clamp, with integral bosshead-EIS-CH0675B
      Code:EIS-CH0675B UOM:Each
      Overseas
      AED 65.89 AED 62.75
      Add to Wish List
      Add to Compare
    17. 2 Prong Double Adjustable Universal Clamp, with integral bosshead-EIS-CH0688D
      Code:EIS-CH0688D UOM:Each
      Overseas
      AED 78.69 AED 74.94
      Add to Wish List
      Add to Compare
    18. 2 Prong Double Adjustable Universal Clamp-EIS-CH0675A
      Code:EIS-CH0675A UOM:Each
      Overseas
      AED 48.49 AED 46.18
      Add to Wish List
      Add to Compare
    19. 2 Prong Single Adjustable Universal Clamp - Large, with integral bosshead-EIS-CH0681B
      Code:EIS-CH0681B UOM:Each
      Overseas
      AED 52.22 AED 49.73
      Add to Wish List
      Add to Compare
    20. 2 Prong Single Adjustable Universal Clamp - Large-EIS-CH0681A
      Code:EIS-CH0681A UOM:Each
      Overseas
      AED 34.81 AED 33.15
      Add to Wish List
      Add to Compare
    Filter
    Set Descending Direction

    12563 items

    Page
    per page
    View as Grid List
    Loading...
    Filter
    Shopping Options
    Category
    1. Chemistry 292 items
      1. Molecular Model Sets 42 items
        1. Molecular Model Sets 6 items
      2. Test Papers 106 items
        1. Chromatography Paper 29 items
      3. Chemistry Charts 10 items
        1. Chemistry Charts 5 items
      4. Gas Preparation & Analysis 12 items
        1. Electrolysis Equipment 12 items
      5. Materials 54 items
        1. Smart Materials 54 items
      6. Molecular Models 57 items
    2. Physics 2776 items
      1. Force & Motion 531 items
        1. Mechanics 318 items
        2. Weights Masses 155 items
        3. Spring Balance 41 items
        4. Forces Measurement 10 items
        5. Dynamics & Collisions 7 items
      2. Electricity & Magnetism 1220 items
        1. Electromagnetism & Motors 72 items
        2. Magnetism 103 items
        3. Electrostatics 55 items
        4. Electricity & Circuits 679 items
        5. Electricity Measuring Instruments 61 items
        6. Sensors 23 items
        7. Locktronics Kits 227 items
      3. Light & Optics 475 items
        1. Reflection & Refraction 396 items
        2. Spectroscopy 20 items
        3. Colour 24 items
        4. Laser 11 items
        5. Spectrum Tubes & Lamps 24 items
      4. Heat & Thermodynamics 197 items
        1. Temperature & Heat 123 items
        2. Pressure & Gas Laws 31 items
        3. Energy Transfer & Engines 22 items
        4. Atomic & Nuclear 21 items
      5. Lab Instruments 216 items
        1. Power Supplies 68 items
        2. Measurement 73 items
        3. Meter Scales 14 items
        4. Spare Part 3 items
        5. Gas & Pressure Experiments 35 items
        6. Electron Tubes 23 items
      6. Waves & Oscillation 120 items
        1. Sound-&-Resonance 60 items
        2. Wave-Motion 59 items
        3. Spectroscopy 1 item
      7. Alternative Energy 2 items
        1. Solar Panel 2 items
      8. Lab Equipment 15 items
        1. Data Loggers 15 items
    3. Biology 1656 items
      1. Human Anatomy 356 items
        1. Human Anatomy Models 331 items
        2. Human Skeletons & Bones 18 items
        3. Human Anatomy Models_Featured 7 items
      2. Health & Genetics 15 items
        1. Health & Genetics Models 7 items
        2. Equipment & Supplies 8 items
      3. Entomology & Zoology 286 items
        1. Zoology Supplies 10 items
        2. Zoology Models 62 items
        3. Entomology Supplies 17 items
        4. Dissection 197 items
      4. Microscopy 560 items
        1. Microscopes & Accessories 315 items
        2. Microscopy Equipment &Supplies 194 items
        3. Prepared Slides 51 items
      5. Botany 142 items
        1. Botany Equipment & Supplies 52 items
        2. Botany Models 77 items
        3. Plant Growing Equipment 13 items
      6. Life Science 136 items
        1. Microbiology 11 items
        2. Enzymes 32 items
        3. Electrophoresis 71 items
        4. Chromatography 15 items
        5. Protein Analysis 4 items
        6. PCR & Thermal Cycling 3 items
      7. Forensic Science 67 items
        1. Genetics & DNA Activities 27 items
        2. Forensics Equipment 40 items
      8. Microbiology 15 items
        1. Antibiotics 15 items
      9. Lab Supplies 35 items
        1. Cultures 35 items
      10. Genetics 11 items
        1. Electrophoresis 11 items
      11. Geology 31 items
        1. Rock Samples 31 items
      12. Primary Science 2 items
        1. Life Sciences 2 items
    4. Glassware 2456 items
      1. Glassware Parts & Accessories 28 items
        1. Glass Adapters 6 items
        2. Glass Heads 3 items
        3. Glass Stopcocks 5 items
        4. Quickfit Accessories 14 items
      2. Glass Dishes & Jars 32 items
        1. Glass Evaporating Basins 8 items
        2. Glass Crystalizing Dishes 5 items
        3. Glass Jars 16 items
        4. Glass Troughs 3 items
      3. Glass Beakers 259 items
        1. Plastic Beakers 73 items
        2. Low Form Beakers 89 items
        3. Tall Form Beakers 57 items
        4. Watch Glasses 7 items
        5. Heavy Duty Beakers 33 items
      4. Glass Bottles 232 items
        1. BOD Bottles 2 items
        2. Dropping Bottles 41 items
        3. Gas Washing Bottles 6 items
        4. Reagent Bottles 175 items
        5. Weighing Bottles 8 items
      5. Glass Columns & Condensers 184 items
        1. Bulb Condensers 4 items
        2. Liebig Condensers 13 items
        3. Vigrex Columns 8 items
        4. Allihn Condenser 4 items
        5. Graham Condenser 2 items
        6. Quickfit Condensers 33 items
        7. Quickfit Adapters 119 items
        8. Quickfit Accessories 1 item
      6. Glass Burettes 60 items
        1. Automatic Zero 4 items
        2. Glass Key Stopcock 8 items
        3. PTFE Key Stopcock 19 items
        4. Rotaflow 12 items
        5. Pinch Clip 1 item
        6. Schellbach 16 items
      7. Glass Flasks 725 items
        1. Boiling Flasks 118 items
        2. Erlenmeyer Flasks 174 items
        3. Distillation Flasks 74 items
        4. Filtering Flasks 19 items
        5. Other Flasks 75 items
        6. Volumetric Flasks - Class A 79 items
        7. Volumetric Flasks - Class B 81 items
        8. Volumetric Flasks - ASTM 2 items
        9. Flat Bottom Flask 20 items
        10. Round Bottom Flask 65 items
        11. Low Form Beakers 18 items
      8. Glass Funnels 260 items
        1. Dropping Funnels 75 items
        2. Filter Funnels 16 items
        3. Powder Funnels 5 items
        4. Buchner Funnels 35 items
        5. Separating Funnels 94 items
        6. Thistle Funnels 6 items
        7. Conical Funnels 29 items
      9. Glass Graduated Cylinders 85 items
        1. Class B 42 items
        2. Class A 36 items
        3. Cylinder Protectors 7 items
      10. Glass Sets & Apparatus 55 items
        1. Other Glass Apparatus 27 items
        2. Distillation Apparatus 15 items
        3. Organic Chemistry Sets 1 item
        4. Extraction Apparatus 12 items
      11. Glass Pipettes 37 items
        1. Class B 23 items
        2. Class A 14 items
      12. Burettes & Pipettes 221 items
        1. Pipette Accessories 52 items
        2. Class A 17 items
        3. Pasteur Pipettes 13 items
        4. Rotaflow 2 items
        5. Manual Pipette Fillers 15 items
        6. Burettes 28 items
        7. PTFE Key Stopcock 4 items
        8. Class B 38 items
        9. Single Channel Pipettes 24 items
        10. Bulk Pipette Tips 13 items
        11. Manual Multi Channel Pipettes 15 items
      13. Lab Instruement 88 items
        1. Specialist Quickfit 88 items
      14. Measuring Cylinders 69 items
        1. Measuring Cylinders 14 items
      15. Glass Test Tubes 115 items
        1. Rimless 44 items
        2. Rimmed 71 items
      16. Gas Preparation & Analysis 6 items
        1. Absorption Tubes 6 items
    5. Lab Equipment and Supplies 5334 items
      1. Metal Labware 270 items
        1. Clamps & Bossheads 162 items
        2. Metal Bases & Rods 70 items
        3. Lab Jacks & Stands 24 items
        4. Metal Beakers 14 items
      2. Lab Equipment 1942 items
        1. Scales & Balances 69 items
        2. Lab Burners 29 items
        3. Heating & Stirring Equipment 142 items
        4. Miscellaneous 2 items
        5. Water Baths 133 items
        6. Centrifuges 35 items
        7. Desiccators 24 items
        8. Meters & Testers 4 items
        9. Water Stills 14 items
        10. Storage Trolleys & Frames 823 items
        11. Water Purification Accessories 47 items
        12. Autoclave Accessories 16 items
        13. Precision Balances 184 items
        14. Measuring Equipment 21 items
        15. Soldering 18 items
        16. Storage Container & Accessories 79 items
        17. Incubators 25 items
        18. Ice Machines 16 items
        19. Data Loggers 245 items
        20. Cameras 11 items
        21. Lab Burner Accessories 5 items
      3. Lab Supplies 1519 items
        1. Lab Accessories 288 items
        2. Tongs 58 items
        3. Lab Burner Accessories 83 items
        4. Tubes & Vials 127 items
        5. Brushes 76 items
        6. Sieves 6 items
        7. Stoppers 172 items
        8. Rubber Tubing 64 items
        9. Clips 39 items
        10. Petri Dishes 36 items
        11. Filtering Supplies 100 items
        12. Scoops & Spatulas 66 items
        13. Stirring Bars & Rods 44 items
        14. Micropipettes & Tips 39 items
        15. Glass Tubing 46 items
        16. Thermometer 94 items
        17. Adapters & Stopcocks 30 items
        18. Learning Aids 31 items
        19. Consumables 22 items
        20. Loops & Spreaders 25 items
        21. Cleaning 13 items
        22. Clocks and Timers 44 items
        23. Syringe 14 items
        24. Lab Supplies 2 items
      4. Ceramic Labware 207 items
        1. Dishes and Jars 71 items
        2. Beehive Shelves 4 items
        3. Crucibles 86 items
        4. Funnels 14 items
        5. Mortar & Pestles 32 items
      5. Plastic Labware 357 items
        1. Plastic Bottles & Carboys 140 items
        2. Plastic Wash Bottles 43 items
        3. Plastic Burettes 4 items
        4. Plastic Beakers & Jugs 47 items
        5. Plastic Measuring Cylinders 64 items
        6. Plastic Flasks 9 items
        7. Plastic Funnels 44 items
        8. Plastic Pneumatic Troughs 3 items
        9. Plastic Sets and Apparatus 3 items
      6. Racks & Stands 178 items
        1. Bottle Stands 2 items
        2. Pipette & Burette Stands 10 items
        3. Draining Racks 6 items
        4. Test Tube Racks 80 items
        5. Microtube Racks 7 items
        6. Flask Stands 2 items
        7. Funnel Stands 7 items
        8. Racks 64 items
      7. Safety Supplies 579 items
        1. Gloves 114 items
        2. Eye Protection 86 items
        3. Lab Coats & Aprons 59 items
        4. Safety Storage Cabinets 66 items
        5. Health & Fitness 24 items
        6. Surface Protection 18 items
        7. Safety Signs and Labels 154 items
        8. Respiratory Protection 15 items
        9. Cryogenic Storage Systems 11 items
        10. Disposal 12 items
        11. Fume Cupboards & Cabinets 16 items
        12. Disinfection Equipment 4 items
      8. Environmental Science 55 items
        1. Field Studies 55 items
      9. Glass Bottles 31 items
        1. Reagent Bottles 31 items
      10. Glass Flasks 37 items
        1. Boiling Flasks 3 items
        2. Erlenmeyer Flasks 27 items
        3. Filtering Flasks 1 item
        4. Other Flasks 6 items
      11. Lab Instruments 25 items
        1. Power Supplies 17 items
        2. Measurement 8 items
      12. Burettes & Pipettes 25 items
        1. Manual Pipette Fillers 17 items
        2. Pasteur Pipettes 5 items
        3. Burettes 3 items
      13. Glass Funnels 34 items
        1. Filter Funnels 10 items
        2. Separating Funnels 24 items
      14. Glass Pipettes 13 items
        1. Class A 13 items
      15. Glass Beakers 8 items
        1. Watch Glasses 2 items
        2. Plastic Beakers 1 item
        3. Heavy Duty Beakers 5 items
      16. Specialist & Analysis 14 items
        1. Health & Diagnostics 14 items
      17. Light & Optics 4 items
        1. Spectroscopy 4 items
      18. Test Papers 15 items
        1. Test Papers 15 items
      19. Entomology & Zoology 21 items
        1. Dissection 21 items
    6. Geology 38 items
      1. Geology 38 items
        1. Geology Charts & Models 27 items
        2. Globes 5 items
        3. Geology Specimen Collections 2 items
        4. Geology Slides 4 items
    7. Curricular 11 items
      1. Primary Science 11 items
        1. Life Sciences 8 items
        2. Physcial Science 3 items
    Price
    Catalogue
    1. VITTA EDUCATION 1256 items
    2. EISCO 3769 items
    3. SLS Science 7536 items
    Brand
    1. Gratnells 857 items
    2. EISCO 4398 items
    3. Draper 2 items
    4. 3M 19 items
    5. Millipore 9 items
    6. Motic 106 items
    7. Sls Select 224 items
    8. Simax 188 items
    9. Brannan 59 items
    10. Jmd Scientific 148 items
    11. Prestige 2 items
    12. Kartell 44 items
    13. Quickfit 316 items
    14. Whatman 72 items
    15. Select Education 8 items
    16. Nalgene 39 items
    17. Falcon 1 item
    18. Molymod 40 items
    19. Neodisher 8 items
    20. Miele 16 items
    21. Swann-Morton 47 items
    22. Jpr Electronics 250 items
    23. R And L Enterprises 42 items
    24. Glassco 80 items
    25. Stuart 4 items
    26. Euromex 55 items
    27. Samco 104 items
    28. Sterilin 5 items
    29. Kern 82 items
    30. Ohaus 117 items
    31. Adam 21 items
    32. Atp Instrumentation 28 items
    33. Mettler 31 items
    34. And 3 items
    35. Academy 68 items
    36. Nickel Electro 77 items
    37. Pyrex 168 items
    38. Clifton 57 items
    39. Grant 35 items
    40. Cole-Parmer 36 items
    41. Bio-Rad 83 items
    42. Duracell 5 items
    43. Duran 62 items
    44. Azlon 193 items
    45. Kimble 7 items
    46. Simport 11 items
    47. Rasotherm 52 items
    48. Meridian Bioscience 4 items
    49. Jaytec 16 items
    50. Sls Flowgen 29 items
    51. Nekem 4 items
    52. Wheaton 7 items
    53. Neville And More 16 items
    54. Mbl 50 items
    55. Heathrow 54 items
    56. Lab Glass 18 items
    57. Signs And Labels 49 items
    58. Brand 3 items
    59. Sls Lab Basics 47 items
    60. Thermo Scientific 1 item
    61. Axygen 3 items
    62. Ley 33 items
    63. Decon 9 items
    64. Teepol 1 item
    65. Tristel 3 items
    66. Virkon 5 items
    67. Azo 1 item
    68. Kimberly Clark 5 items
    69. Jubilee 4 items
    70. Oxoid 22 items
    71. Wpa 2 items
    72. Hanna 34 items
    73. Statebourne 11 items
    74. Cleaver 22 items
    75. Sharpsguard 4 items
    76. Genlab 17 items
    77. Leec 6 items
    78. Astell 1 item
    79. Eppendorf 1 item
    80. Bright Sparks 4 Kids 24 items
    81. Psu Base 22 items
    82. Optika Science Italy 8 items
    83. Ipc Irwin 53 items
    84. Lascells 144 items
    85. Gilson 8 items
    86. Safelab 4 items
    87. Ecosafe 26 items
    88. Benchmark 6 items
    89. Locktronics 250 items
    90. Scotsman 6 items
    91. Porkka 7 items
    92. Adelphi 4 items
    93. Data Harvest 170 items
    94. Mindsets 53 items
    95. Logit 64 items
    96. Alpha Laboratories 2 items
    97. Lonza 28 items
    98. Sigma Aldrich 1 item
    99. Tickit 13 items
    100. Shaw Magnets 10 items
    101. Eo Labs 1 item
    102. Neogen 1 item
    103. Knittel 1 item
    104. Runlab 5 items
    105. Johnson Test Papers 33 items
    106. Ravencourt 11 items
    107. Volac 2 items
    108. Sartorius 15 items
    109. Sciencethic 12 items
    110. Inspire 39 items
    111. Polyco Healthline 4 items
    112. Bolle 25 items
    113. Work In Style 23 items
    114. Uvex 29 items
    115. Portwest 3 items
    116. Shield Scientific 21 items
    117. Aero Healthcare 3 items
    118. Marigold 9 items
    119. Sempermed 2 items
    120. Ansell 3 items
    121. Gloveplus 26 items
    122. Moldex 1 item
    123. Sharpak 3 items
    124. Merck Third Party 2 items
    125. Bel-Art 1 item
    126. Qmp 19 items
    127. 3B Scientific 124 items
    128. Vernier 57 items
    129. Bright Of Sweden 4 items
    130. Cochranes Of Oxford 13 items
    131. Sls Lab Pro 24 items
    132. Ika 6 items
    133. Cowie Technology 36 items
    134. Topstore 2 items
    135. Comark 1 item
    136. Haier 1 item
    137. Smeg 4 items
    138. Fistreem 4 items
    139. Purite 6 items
    140. Elga 4 items
    141. SLS 1063 items
    142. Vitta Education 1256 items
    UOM
    1. EA 3 items
    2. PK-4 25 items
    3. PK-10 845 items
    4. PK-12 123 items
    5. PK-24 5 items
    6. PK-36 6 items
    7. PK-40 9 items
    8. PK-50 65 items
    9. PK-72 5 items
    10. PK-96 6 items
    11. PK-144 4 items
    12. PK-288 2 items
    13. Each 9723 items
    14. Set 143 items
    15. PK-6 98 items
    16. PK-30 8 items
    17. PK-60 6 items
    18. PK-25 28 items
    19. PK-100 472 items
    20. PK-200 18 items
    21. PK-20 65 items
    22. PK-500 35 items
    23. PK-1000 46 items
    24. PK-2000 1 item
    25. PK-3 19 items
    26. PK-15 5 items
    27. PK-300 8 items
    28. PK-250 21 items
    29. PK-600 5 items
    30. PK-150 7 items
    31. PK-120 2 items
    32. PK-450 1 item
    33. PK-400 7 items
    34. Kit 27 items
    35. PK-90 3 items
    36. PK-5 252 items
    37. PK-8 14 items
    38. PK-2 159 items
    39. PK-28 2 items
    40. PK-9 1 item
    41. PK-18 6 items
    42. PK-156 2 items
    43. PK-48 3 items
    44. PK-108 1 item
    45. PK-54 2 items
    46. PK-7 1 item
    47. PK-17 2 items
    48. Pair 56 items
    49. PK-33 1 item
    50. PK-35 2 items
    51. PK-42 3 items
    52. PK-80 2 items
    53. PK-68 1 item
    54. PK-700 1 item
    55. PK-720 1 item
    56. PK-132 2 items
    57. PK-104 1 item
    58. PK-475 2 items
    59. PK-252 1 item
    60. PK-63 1 item
    61. PK-140 1 item
    62. PK-420 1 item
    63. PK-67 2 items
    64. PK-53 1 item
    65. PK-86 2 items
    66. PK-225 1 item
    67. PK- 1 item
    68. Pack 113 items
    69. Reel 29 items
    70. Each range 1 item
    71. Any range 1 item
    72. Set of 6 2 items
    73. 20PR 1 item
    74. 10PR 10 items
    75. 12PR 4 items
    76. PK-112 1 item
    77. PK-127 2 items
    78. PK-88 1 item
    79. PK-110 2 items
    80. PK-1715 1 item
    81. PK-245 1 item
    82. PK-5000 1 item
    83. PK-168 1 item
    84. PK-2850 1 item
    85. PK-2295 1 item
    86. PK-2880 1 item
    87. PK-625 1 item
    88. PK-825 1 item
    89. PK-960 5 items
    90. PK-768 1 item
    91. PK-399 2 items
    92. PK-264 2 items
    93. PK-350 1 item
    94. PK-380 1 item
    95. PK-275 1 item
    Supplier
    1. EISCO 3770 items
    2. SLS Science 7537 items
    3. VITTA EDUCATION 1256 items
    collins
    gelli_baff
    Scola
    pritt
    mobilo
    giotto
    faber_castell
    mitre
    staedtler
    bic
    lyra
    bordette
    smart-kids
    swash
    crayola
    daler_rowney