Protective coating helps prevent glass from shattering and reduces spills. Flasks are autoclavable (121degC), resistant to thermal shock, and are graduated to show approximate capacity. Tubulation OD is 10 mm on sizes up through 1000 mL. Tubulation OD is 12.5 mm on 2000-mL and 4000-mL sizes. The uncoated tubulation allows easy connection of standard size tubing. Note: Do not place over direct heat or flame. Do not heat above 120degC moist heat or 110degC dry heat.

Class A glassware is manufactured to tolerances established by ASTM E-694 for volumetric ware, ASTM E-542 for calibration of volumetric ware, and ASTM E-288 for volumetric flasks.