Borosilicate Glass Filtering Flasks include a heavy-duty rim and a bolt neck with tubulation.
- Graduations are printed in durable white enamel.
- Manufactured from low-expansion Type 1, Class A Borosilicate 3.3 glass that complies with ASTM E438 Standard Specification for Glasses in Laboratory Apparatus.
- It is low alkali glass with a typical chemical composition of approximately 81% silica, 13% boric oxide, 4% sodium oxide, and 2% aluminum oxide.
- It is virtually free of magnesia-lime-zinc group, and contains only traces of heavy metals.
- Capacities up to 1000ml use 3/8" ID tubing, Sizes larger than 1000ml use 1/2" ID tubing.