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#7 Drilled Rubber Stopper (DRS)


This #7 Drilled Rubber Stopper (DRS) has a diameter of 1 7/16", a bottom diameter of 1 3/16", and a 3/8" hole drilled in the center, a perfect size for an airlock.

This #7 rubber stopper fits most 356, and 6.5 gallon glass carboys. It sits higher in the opening than #6.5 stoppers.

Frequently purchased with a fermentation lock.

Also available as a #7 solid rubber stopper.