Corning Pyrex 250 ml Class A Lifetime Red Volumetric Flask With Polyethylene Snap-Cap

These 250 mL Class A PYREX Lifetime Red volumetric flasks have the capacity mark etched as a fine line through a narrow red band into clear glass, making a filler unnecessary and giving high legibility, accuracy and permanence. The strength of these flasks has been increased appreciably through machine-blown bodies to which are sealed heavy-tubing necks tooled for No. 250 polyethylene snap-caps. For replacement snap-caps see No. 7666. 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.