These Class A glass volumetric flasks feature a durable, machine-blown body with a heavy-beaded tubing neck tooled to fit a snap-cap. The graduation line is sharp and permanent large white block letters make the inscription easy to read. The 1-mL and 2-mL sizes are test tube shaped. The 10-mL through 2000-mL sizes are supplied with LDPE snap-caps. Flasks are 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. Easy and accurate dilutions?sharp line for precise volume Durable glass construction for repeated use Volumetric flask features 2000 mL capacity with ?0.50 mL tolerance. Includes snap cap