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: 282843220

Details

Brand
MRbrew
Color
Black
Material
Plastic
Number of Packs
1
Unit Count
28 Count

🔧Includes specialized o-ring removal tool

♻️Reusable rubber & silicone for long-term use

🛡️28 durable seals for leak-proof kegging

R345

Duties & taxes included

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🍺 Seal the deal with every pour—no leaks, just legendary brews!

BUILT TO LAST - Durable materials resist wear and tear, making this kit a reliable companion for countless brew sessions.
COMPLETE KEGGING KIT - 28-piece set covers ball lock posts, dip tubes, and carbonation lids—everything your homebrew system demands.
LEAK PROOF CONFIDENCE - Premium rubber and silicone seals ensure zero leaks, keeping your brew fresh and your setup mess-free.
PERFECT FIT GUARANTEE - Precisely sized gaskets designed for Cornelius kegs and ball lock systems, ensuring seamless installation every time.
TOOL ASSISTED MAINTENANCE - Includes a plastic o-ring removal tool to protect your gear and simplify gasket swaps without damage.

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 posts, dip tubes, and carbonation lids, plus a specialized removal tool to maintain your equipment without damage. Engineered for durability and leak prevention, it’s an essential upgrade for any serious homebrewer aiming for flawless keg performance.

Specifications

ASIN	B08VMR5KHG
Best Sellers Rank	#40,309 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #10 in Beer Brewing Kegs & Kegging
Brand Name	MRbrew
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (222)
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
Set Name	MRbrew Homebrew Gasket Set
Unit Count	28 Count

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R345

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered 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 South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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