Drilled Rubber Stopper No. 13 - Tapered Carboy Bung

This #13 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
• 2 11/16" Top Diameter
• 2 5/16" Bottom Diameter
• Gum Laboratory Drilled Stopper