PYREX® Lifetime Red™ Class A Volumetric Flask with Glass [ST] Stopper, Corning 5660

These Corning 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 this flask results from the use of a machine blown body which is sealed to a heavy-tubing neck tooled for a standard taper glass stopper. This volumetric flask has been calibrated 'To Contain' (TC), and has 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.