What is the physical size???

These are not "ideal" for all 5gallon water jugs! Does not fit Primo 5 gallon walmart jugs! Get a smaller size for them!

What OD tubing will work best to fit snug on the center hole? 3/8 or 5/16?

Thanks for asking. 3/8in OD tubing fits in the hole but may be a bit loose. Therefore, 7/16in OD tubing will provide a tight seal despite taking some effort to squeeze in.

does this fit a gallon carboy?

No. You will want a universal or 6.5 stopper for a one gallon jug.

What is the hole diameter in the stopper

The stoppers I received had holes approximately 3/8 inch in diameter.

Carboy Stopper 10 Rubber Bung For Beer Wine And Mead

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Description

🍻 Seal your brew like a pro—no leaks, no worries!

VERSATILE COMPATIBILITY - Optimized for 3, 5, 6, and 6.5-gallon glass carboys—ideal for homebrewing, winemaking, and cider crafting.
TRUSTED QUALITY SUPPORT - FastRack’s commitment means if your order isn’t perfect, they’ll make it right—brewing peace of mind included.
DURABLE FOOD SAFE MATERIAL - Crafted from BPA-free, lab-grade natural rubber built to withstand heat and wear for long-term use.
LEAK RESISTANT TAPERED DESIGN - Snug tapered shape with curved lip guarantees an airtight, slip-free seal every time.
PRECISION DRILLED FOR PERFECT FIT - 3/8" center hole engineered for standard fermentation airlocks ensures seamless integration.

The FastRack Drilled Rubber Stopper (#10, 3-pack) is a premium, BPA-free natural rubber bung designed with a precise 3/8" hole to fit standard fermentation airlocks. Its tapered, leak-resistant design with a curved lip ensures a secure seal for 3 to 6.5-gallon glass carboys, making it an essential tool for homebrewers and fermentation enthusiasts seeking durability and airtight performance.

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B$26

Duties & taxes included

In stock

Sold byAmazon BruneiDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Brunei.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Carboy Stopper | #10 Rubber Bung for Beer, Wine & Mead Brewing | 3 Pack

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