#11.5 Drilled Rubber Stopper (DRS)

$5.99

The #11.5 Drilled Rubber Stopper (DRS) is a pure white gum laboratory stopper. The top diameter is 2.5", the bottom diameter is 2", and it has a 3/8" hole drilled in the center, the perfect size for an airlock

The 11.5 rubber stopper is also available as an #11.5 Solid Rubber Stopper (SRS).