Pyrex Borosilicate Glass Class B 50ml Volumetric Flask with Standard Taper Stopper - 12 Pack | Laboratory Grade, Heat Resistant Glassware for Chemistry Experiments & Scientific Measurements

These 50mL PYREX economy flasks are designed for those that do not require the precision accuracy of our Class A capacity flasks. Capacity tolerances are twice those specified for Class A volumetric ware. The graduation line is sharp and permanent; large white block letters make inscriptions easy to read. Supplied with No. 9 Standard Taper glass stoppers. For replacement stoppers see No. 7650.