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500ml capacity. This open top, cylindrical dropping funnel is made of high quality Borosilicate glass. Funnel includes a PTFE key stopcock. Funnel measures 14" in length, and has a diameter of 2.5". Top outer diameter is 2.65", and inner diameter measures 2.36" Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.