Drilled No. 7 Stopper

This #7 Rubber stopper bung is drilled with 3/8" center hole to accommodate standard size air locks.

For use with 5 & 6 Gallon Glass Carboys.

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Specifications:

• Made out of Rubber
• 1 7/16" (36.6mm) Top Diameter
• 1 3/16" (30.2mm) Bottom Diameter
• Gum Laboratory Drilled Stopper