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100ml capacity. This cylindrical dropping funnel is made of high quality Borosilicate glass. Funnel includes a PTFE key stopcock and interchangeable plastic stopper. Socket Size 19/26. Funnel measures 9" in length. Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.