Description
The new lids are equipped with a silicone seal housed within the lid. Please ensure that the silicone seal remains properly seated when closing the lid, as it may occasionally shift or fall out. A quick visual inspection before closing will help prevent any issues.
stick back if they came loose.
Will your lids fit my mason jars?
Our lids are designed to fit mason jars labelled Wide Mouth (86mm). These are standard sizes and fit popular branded jars such as Ball, Kerr and Aussie Mason.
We’ve also tested some unbranded/store-brand jars. In August 2026, these were compatible:
Anko (Kmart) 300ml, 550ml and 1000ml preserving jars
Other unbranded jars, or newer batches from the above, may not be the same size, and retailers can change their designs without notice. If you’re unsure, check whether your jar is labelled Regular Mouth or Wide Mouth on the retailer’s website, or order a single lid to test the fit first. That’s the best way to know they’ll work with your jars.
Our lids are not compatible with unthreaded jars, such as Fowlers Vacola.
Choice of 12x or 24x Wide Mouth mason jar lids plain for mycology and general-purpose autoclavable
It fits Wide mouth Jars only (86 mm), not the Regular Mouth. These lids are specially formulated to give the best airtight seal and no leakage so that the content of the jars stays contamination-free.
If used for Mycology, they are:
- Hard enough to make holes
- Good grip to open easily
- Leakproof and has an excellent seal.
Get Everything you need to Make Lids for Liquid Culture or Grain Spawn in our store
If you are interested in Mason Jar and Lids check these listings in our store.
