Flask made of heavy duty borosilicate glass.250ml CapacityLong neckStopper not included Flask made of heavy duty borosilicate glass. 250ml Capacity Long neck Stopper not included 250ml Flat bottom Florence boiling flask made of heavy duty borosilicate glass. Flask has a flat bottom. Long neck, Stopper not included. The flask is ideal for dealing with liquids at different temperatures due to its thick-walled design. It is easy to use in any lab with its flat bottom, narrow neck, and beaded rim. Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.
