Synthetic Filter Paper Sticker 90 mm 0.3 μm PTFE Filter Disc Strong Adhesive Patch for Buchner Funnel Mushroom Cultivation (12pcs)

Purchased these to modify some grow tubs. The smaller ones work best for my tubs.If using the larger patches, less is more. Tried using 4 of the larger patches and it allows too much gas exchange and it's hard to keep humidity.

work good but have since moved on to a different method

this is a good product after further investigation I discovered that all of the patches were there I initiated a return but would like to cancel that now thanks and sorry about the confusion

I used these to filter some gas exchange ports in a high humidity environment and they are doing a great job. There is a noticeable amount of gas and humidity exchange in an a radius around each filter. The adhesive is strong and bonded well with plastic. There is a circle cutout on the throw away backing that is probably useful for sanitizing the “clean side” of the filter prior to application, otherwise I don’t know why they’d go through the trouble to cut holes in it.

They stick well. Have used them all with no issues other than getting them off after I am done lol. They stick VERY well lol

Exactly as advertised.

These filters are perfect for ½ inch hole and they do let air through. They were packaged nice and there was nothing that had come off the sheet everything was in perfect condition.Thank you

It was exactly what I needed!

The product is still working good after four times in a pressure cooker. No contaminations at mycological works.Thank you.

Held up well after first pressure cook, no issues with sticking to PP lid. However, awaiting results of LC and grain jars after inoculation before I can confirm sterile technique

works well!

gut