Made of high quality borosilicate glass Flat base for spill prevention Outlet for tubing located at the base of the bottle 1000ml capacity Perfect for any science or home laboratory Aspirator bottle with outlet for tubing. 1000ml capacity. Flask measures 8.25" tall, and 4.25" in diameter. Inner diameter of neck measures 1". Tubing outlet measures 1.5" long, has an outer diameter 7mm, and an inner diameter of 4mm. Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.