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Price: $8.99
Synthetic filter discs that turn a standard 90mm wide-mouth canning lid into a breathable, contamination-resistant jar lid. Each disc filters to 0.22 micron, and the media is hydrophobic and oleophobic, so condensation and oils don't clog it during incubation.
They're made to be reused: autoclave them with the jar, wash and dry them after the run, and put them back on the next batch. Add a self-healing injection port to the lid and you have a complete DIY inoculation lid.
0.22 micron keeps mold spores and bacteria out while the jar still exchanges gas, unlike a lid with polyfil or nothing at all.
Hydrophobic and oleophobic media resists condensation and oils, so it keeps breathing through humid incubation runs.
Autoclave, wash, dry and reuse. One pack covers a dozen jars run after run.
Make one or two small holes in a metal 90mm wide-mouth lid for gas exchange.
Optional: stick a self-healing injection port over a separate hole so you can inoculate without opening the jar.
Center the disc over the gas-exchange hole(s) and lock it in place under the jar ring.
Pressure-sterilize the jar with the disc in place. After the run, wash and dry the disc for the next batch.
Good for: grain spawn jars, agar wedge and grain-to-grain transfers, and long-term culture storage in wide-mouth jars.
Finish the lidAdd self-healing injection ports for needle inoculation, or skip the DIY with ready-made wide-mouth cultivation lids that already have a filter and port.
Standard 90mm wide-mouth canning jars: Ball, Kerr and other brands that use the same wide-mouth lid size.
Yes. They're washable and fully autoclavable, so you can clean and re-sterilize a disc for the next batch instead of replacing it.
Only if you want to inoculate through the lid without opening it. Pair the disc with a self-healing injection port and the lid handles both gas exchange and inoculation.
Condensation and oils can clog a filter over time and slow gas exchange. Media that resists both keeps breathing through repeated humid incubation runs.
Both filter to 0.22 micron. These are loose 90mm discs that sit under the ring of a standard metal lid; our cultivation lids come with a smaller filter and a port already attached.
Love these! Can be reused and seem to last longer than the filter stickers.
I was using un modded tek on my jars had to get rid of the metal lid tops because I had a lot of jars that would yeast out or contaminate having these provide me with more air flow an more protection I’ve seen a clear faster colonization rate in my jars and less contam definitely will be grabbing some more soon
Best option imo to easily turn wide mouths into grain spawn jars. Excellent product and an excellent company
These are so much easier to use. In conjunction with the 5 grain jars, No intrusions of contamination. Keep your needle hot, use with u/v light alcohol wipes and your favorite inoculation method, And rest easier knowing your jars are safe.
I use these with 100% success to grow my mushroom cultures. I even reuse them and they never fail. This is a quality product and worth every penny.