#4 Drilled Rubber Stopper (DRS)

$1.49

This #4 Drilled Rubber Stopper (DRS) is a pure white gum laboratory stopper and has a top diameter of 1", bottom diameter of 13/16", and a 3/8" hole drilled in the center, perfect size for an airlock.

Our #4 rubber stopper is also available as a #4 solid rubber stopper (srs).