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Need a replacement o-ring for the lid in your Fermonster? This is the replacement o-ring that fits into the lid of your fermonster, creating a good, tight seal for fermentation. O-rings may wear out with time and usage, so it is a good item to have on hand! If you are ordering a replacement Fermonster lid or solid Fermonster lid, you will need this if your original o-ring has also become damaged or gone missing. Always keep a good seal with a spare Fermonster o-ring!

Product Features

  • A replacement o-ring for the lid on a Fermonster
  • Creates a great seal for the Fermonster lid!
  • Easy to install, it is always good to have a spare on hand!
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