#9 Drilled Rubber Stopper (DRS)

$2.50

This #9 Drilled Rubber Stopper (DRS) is a pure white gum laboratory stopper that has a top diameter of 1 3/4", a bottom diameter of 1 1/2", and a 3/8" hole drilled in the center, the perfect size for an airlock

The #9 rubber stopper is also available as a #9 solid rubber stopper (srs).