PYREX® VISTA™ Class A Volumetric Flask with Glass [ST] Stopper, Corning 70640

These PYREX® VISTA™ volumetric flasks provide for precise volume measurements. The necks are tooled to fit the included standard taper glass stoppers securely and the graduation line is sharp and permanent. Large blue block letters allow the inscription to be read easily. Manufactured to Class A tolerances, they comply with ASTM E-694 for volumetric ware, ASTM E-542 for volumetric ware calibration and ASTM E-288 for volumetric flasks.