Academy Conical Flask Narrow Neck 250ml 
Conical/Erlenmeyer, Narrow Neck with Graduations. New, affordable, high quality range of Conical Flasks made from durable 3.3. Borosilicate glass. Superior chemical and heat resistance. Complies to I.S.O 1773 Standard. 250ml Inner Neck Diameter 32mm. 31mm (bottom) rubber stoppers will fit this product. See Product numbers 1159, 1163 and 1494.