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#5.5 Drilled Rubber Stopper (DRS)


Our #5.5 Drilled Rubber Stopper (DRS) is a pure white gum laboratory stopper and has a top diameter of 1 1/8", bottom diameter of 1", and a 3/8" hole drilled in the middle, perfect for an airlock.

This #5.5 drs is also available as a #5.5 solid rubber stopper (srs).