64pcs Synthetic Filter Paper Stickers-20mm Diameter,0.25Micron Filter,Used For Mushroom Cultivation, Place Under The Mason Jar Lids

I've used one of these filter patches and it went great. My stuff is free from contamination.

He's worked great stood up under pressure cooking for sterilization the price is great these are good

These are fantastic.Adherence is excellent.The clear plastic sheet they are stuck to has 32 PER SIDE!!

Works like they should! Make the hole smaller then 1\2 inch or they will get sucked into the hole when pressure cooking. Lost a few, but lesson learned. Thank you. Will order again!

To use. Will update if any filter fail.

I didnt follow the directions and just put the filter on top of my lid. 1/4 (.25) inch hole. They been pressure cooker multiple times... atleast5. I have them installed on one piece stainless steel lids. Dishwashered a few times still holds no problem.The price seems to be slowly climbing though... glad i still got some extras.

So far these have been working great. (FYI I placed these on the inside of the cap like they recommended) I’ve ran them through the pressure cooker 3 times I think now with no problem. I’ve washed all my caps and the stickers got wet in the process with no issue. Just let them dry out. I’ll change/update this review if they begin to fail.

These stayed stuck on plastic after pressure cooking + isopropyl alcohol sanitation. I have to say that I was not expecting them to perform to this degree