12 Synthetic Filter Discs for" Wide Mouth" 87mm jar lids Used for Mushroom Cultivation

Stickiness is good, despite humidity they stay on the tub for weeks on end. It was very functional in getting just enough air through, and the products grow was affected very positively.

Would buy again

Product is made out of a thick fabric with a shiny coating on one size. Was given the option to review adhesion but there is no backer to show an adhesive. I will not be using these as they do not seem to be appropriate for jar sterilization. Product page didn’t include many details and is misleading.

I can see why people had trouble with the air not getting through because you can't get the plastic off of the phone filter try and try I defy you to get the plastic off of the sticky filter that you want to use why did I give it a one star answer is because you can't give zero Stars

Exactly what was needed

Well made

Don't buy this if you were looking for a high quality filter for mushroom jar lid. I was looking for cellulose filter disc and it does say that in the description. I waited for 2 week to get that, but ended up receiving a cheap fabric disc. It's not rigid at all, and doesn't seem will work. I'm going to return it. Should have trusted the other review before I decided to give it a try.Update: I contacted seller, and they said they never heard of cellulose filter, although it was in their item description. They removed the word after I sent them this screenshot immediately.

Not what I expected. The size is right but the material is way more like fabric than the more rigid synthetic filters I have bought in the past. Also they are very hard to cut to size as well. I should have spend the couple of extra dollars and gotten the others. Oh well