Airtrack and blower set-(ELS-PHY2030)

Airtrack and blower set - Absolutely everything needed to set up and run this air track as a nearly friction-less environment. System will cover all fundamentals of dynamics and newtons laws, motion, force, momentum, conservation of energy, etc. No need to spend hours piecing together systems, everything is included. Included: 2m Air track (1) Blower and Plug for air track (1) 100gm Slider with mounting bracket (2) Attachment Nuts (1) Spring Attachments (4) Connection Bracket (for springs, string, etc.) (4) 2 inch spring (2) 4 inch spring (2) Male Verlco Bumper (2) Female Velcro Bumper (2) Friction-less Pulley and Bracket (2) String (20 feet) 5gm slotted masses (9) Slotted Mass hanger (1) Photogate Interruption Screens (8) Elastic Launching Cradle / Bumper (1) 12.5 gm Slider masses (4) 25 gm Slider masses (4) Photogate/accessory attachment arm (2) Leveling Feet (3) Air Input Valve (1) Measuring Meter on track (1) -