Flask, Pyrex Mixing Volumetric, Class A, with Standard Taper Glass Stopper, 500 mL, 1/CS, Corning, 5820-500

PYREX® 500 mL Class A Mixing Volumetric Flask with Glass Standard Taper Stopper.

The upper bulb, located between the stopper and the capacity graduation is approximately one-tenth the flask rated capacity. The 2L size upper bulb is only one-twentieth capacity. The additional bulb assists in the mixing of liquids or powders when shaken.