New, affordable, high quality range of Filter Flasks made from durable Borosilicate glass. Superior chemical and heat resistance. Heavy walled with glass sidearm. Arm will fit tubing with a 8mm internal diameter (All flask sizes). 1000ml Inner Neck Diameter 34mm. 33mm (bottom) rubber stoppers will fit this product. See Product numbers 1165, 1476 and 1495.