Drilled No. 7.5 Stopper

This #7.5 Rubber stopper bung is drilled with 3/8" center hole to accommodate standard size air locks.

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Specifications:

• Made out of Rubber
• 1 17/32" (39mm) Top Diameter
• 1 7/32" (31mm) Bottom Diameter
• Gum Laboratory Drilled Stopper