PYREX® Volumetric Flask with PTFE Stopper, Class A Corning®
These Class A PYREX® volumetric flasks have machine-blown bodies to which are sealed heavy-beaded, heavy-tubing necks, tooled for PTFE color-coded keyhole stoppers
The graduation line is sharp and permanent. Large white block letters make the inscription easy to read. These 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.