Academy Filter Flask 250Ml 
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). 250ml Inner Neck Diameter 30mm. 29mm (bottom) rubber stoppers will fit this product. See Product numbers 1158, 1162 and 1493.