Pyrex Vista Borosilicate Glass Class A 25ml Volumetric Flask with Standard Taper Stopper - Set of 12 - Ideal for Chemistry Labs, Scientific Experiments & Precise Liquid Measurements

These PYREX VISTA 25mL volumetric flasks provide precise volume measurement. These flasks have sealed necks tooled for No. 9 Standard Taper glass stoppers. The graduation line is sharp and permanent and large blue block letters make the inscription easy to read. These Class A volumetric flasks have been manufactured to Class A tolerances as established by ASTM E- 694 for volumetric ware, ASTM E-542 for calibration of volumetric ware and ASTM E-288 for volumetric flasks.