#6.5 Drilled Rubber Stopper (DRS)


The #6.5 Drilled Rubber Stopper (DRS) is a pure white gum laboratory stopper. The top diameter is 1 3/8", the bottom diameter is 1 1/8", and it has a 3/8" hole drilled in the center, the perfect size for an airlock.

The #6.5 rubber stopper fits most 3, 5, 6, and 6.5 gallon glass carboys.

Also available as a #6.5 solid rubber stopper (srs) or try the universal carboy stopper.