PYREX® Class B Economy Volumetric Flask with Glass [ST] Stopper, Corning 5641

These Corning 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 stopper. Material: borosilicate glass code 7740