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100ml capacity, round bottom distilling flask made of high quality, heavy duty 3.3 borosilicate glass. Three angled joints. Center socket size is 24/29, side sockets sizes are 14/23. No stoppers included. Flask stands 4" tall, and base measures 2.5" in diameter. Total width of flask is 3.25".Autoclavable, with superior chemical durability. Low temperature gradient- can withstand high temperatures & thermal shocks. Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.