4-Pack Drilled #6 Rubber Stoppers

Q: is the hole perfectly centered?and what ios the size?

The hole is perfectly centered and is 9.6 mm or .378" wide

Q: How do you stop them from slipping out on their own?

I found that putting a couple inches of paper towel over the bottom not only keep the stopper from slipping out.. it also adds a bit more protection from things entering the hole while your unaware. I've just did 4 gallons of grapes with blueberries.. the meter read just shy of a desert wine.. it turned out wonderfully light and easy to drink. THE MAX

Q: Will these fit a 5 gallon plastic water jug used for drinking water dispenser?

If you need to cap 5 gallon drinking water jugs, you may be looking for this type of product instead (5 Gallon Water Jug Cap) https://www.amazon.com/dp/B0B3QXM4JG

Q: what is the diameter of the hole?

3/8th inch. It matches all standard fermenter airlocks.

4.5/5

Product ID: 488187855

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Details

Material
Rubber
Brand
Dishwasher safe?
Yes

🌿Premium natural rubber for durability

🍺Perfect fit for 64 oz to 6.5 gal vessels

🛠️Precision-drilled for standard airlocks

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Description

🍻 Seal your craft, savor the moment!

AIRLOCK READY DESIGN - Pre-drilled stopper holes ensure effortless attachment of standard airlocks—no extra tools needed.
COMPACT 4 PACK VALUE - Four stoppers per pack means you’re always ready to scale your fermentation game without missing a beat.
DURABLE NATURAL RUBBER - Crafted from premium natural rubber to withstand fermentation pressures and repeated use.
SEAMLESS FERMENTATION FIT - Engineered to snugly seal 64 oz growlers, 1 gallon jugs, and 6.5 gallon carboys for flawless brewing.
VERSATILE BREWING ESSENTIAL - Ideal for beer, wine, mead, and other fermented creations—unlock your craft potential.

This 4-pack of #6 rubber stoppers by Fermentaholics features precision-drilled holes for standard airlocks, fits a range of fermentation vessels from 64 oz growlers to 6.5 gallon carboys, and is made from premium natural rubber for durability and airtight sealing—perfect for homebrewers and fermentation enthusiasts looking to elevate their craft.