Will these fit a 12oz SS coffee mug?!

These are meant to fit a "Corny" keg used mostly by homebrewers these days. The lid opening on that is about 4 inches by 2 ¾ (that is a rough guess). They are also quite think at about ⅜ of an inch. The smaller gaskets are maybe ½ inch and smaller.

Will these work on a firestone keg?

Yes. I used this to replace gaskets in one of my Firestone kegs. Make sure you get a tube keg lube and give the gaskets a light coating when you install them.

Weird question, I know, can these go in the oven/withstand heat?

Thank you for your question, it can not be put into the oven.

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MRbrew Corny Keg O-Ring Gasket Kit, 28 Pcs Rubber Seals for Homebrew Keg

MRbrew Corny Keg O-Ring Gasket Kit, 28 Pcs Rubber Seals for Homebrew Keg

Product ID: 433201317

Details

Brand
MRbrew
Colour
Black
Material
Plastic
Net Quantity
28.0 Count
Number of Packs
1

🔧Includes o-ring removal tool for easy maintenance

♻️Reusable rubber & silicone for long-lasting use

🛡️28 durable seals for leak-proof kegging

7800 som

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Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🍺 Lock in freshness, unlock your brew’s full potential!

BUILT TO LAST - Premium rubber and silicone materials resist wear and simplify cleaning
ALL IN ONE KEGGING KIT - Complete set covers ball lock posts, dip tubes, and carbonation lids
EFFORTLESS MAINTENANCE - Bonus plastic removal tool prevents damage during seal swaps
SEAL YOUR BREW LIKE A PRO - 28 precision-fit o-rings ensure zero leaks and maximum freshness
UPGRADE YOUR HOMEBREW SETUP - Trusted by 190+ brewers for a perfect fit and unbeatable value

The MRbrew Corny Keg O-Ring Gasket Kit offers 28 high-quality rubber, silicone, and plastic seals designed specifically for homebrew keg systems. This comprehensive set includes gaskets for ball lock keg posts, dip tubes, and carbonation lids, plus a plastic removal tool to protect your equipment during maintenance. Engineered for durability and leak prevention, it’s a must-have upgrade for any serious homebrewer seeking reliable, long-lasting keg seals.

Specifications

ASIN	B08VMR5KHG
Brand Name	MRbrew
Colour	Black
Customer Reviews	4.5 4.5 out of 5 stars (193)
Item Highlight	Corny Keg Replacement O Ring Seals Kit, Multi Size Gaskets Fit Keg Lid Dip Tube Ball Lock Post, Kegerator Essential Parts
Material Type	Plastic
Number of Items	28
Number of Packs	1
Number of Pieces	21
Unit Count	28.0 Count

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TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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7800 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered 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 Kyrgyzstan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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