LabStock 250ml Erlenmeyer Flask, Glass with Rubber Stoppers, Pack of 6
A heavy glass flask useful for safely mixing, storing and heating fluids. These flasks are made of heat-resistant borosilicate glass and have a heavy beaded rim for safety, with a large white marking spot. Capacity of 250ml, graduations are at 50ml.  3 1/4" diameter x 5 1/2" tall with no. 6 rubber stopper.  Pack of 6 flasks