2000ml Borosilicate Glass Separatory Funnel 6" diameter, 21" height Fitted with a 29/32 interchangeable plastic Stopper PTFE stopcock Ungraduated This 2000ml separating funnel has a robust pear shaped body with a 6" diameter at its widest point. The item measures 21" in height when positioned upright and is designed with a PTFE key stopcock that allows optimal control of flow when working with liquids in the lab. The interchangeable 29/32 stopper fits the 1.2" opening at the top of the funnel. Made from quality borosilicate glass. Ungraduated. Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.