Zonon 128 Pieces Synthetic Filter Paper Stickers 20 mm 0.3 ?m Synthetic Filter Disc Tape Mushroom Applied Under Wide Mouth Mason Jar for Mushroom Cultivation

These filters are very easy to use and have worked well so far. They adhere nicely, allow proper airflow, and I haven’t had any contamination issues since using them. Everything has stayed clean and stable, which is exactly what I was hoping for. I’m very happy with the quality and performance and would definitely purchase again.

These have worked great for making my mushroom spawn jars! Have only had one issue with one jar where the filter came off a bit but I think it was just old and needed to be replaced because I had used it multiple times before without any issues. Will purchase these again when the time comes.

These stuck on great. So far so good and seem to work great even after pressure cooking in jars.

I like the filters

Holds up super well in the PC! High quality and have had zero contamination issues

Works as it should with my mycology needs.

I have some of these that are over a year old and have been thru my PC over 10x, they hold up well. Not a single contamination issue. You MUST autoclave these, they are absolutely not sterile as is. Prepare jars, apply stickers over the GE holes and autoclave as desired.

Drill two 1/4 inch holes. Insert a self-healing injection port and put one of these on the other hole. Use for liquid culture or spawn jars to allow for air exchange. I've only gotten to use them once but they held up to pressure cooking for 90 minutes to sterilize.

Great gas exchange and stay stuck on. Have had many successful jars.

They are too porous and the adhesive won't last beyond a single use. Use 4 layers of 3M micropore tape instead.