3" Adhesive Monotub 100% Recycled Disc Filters (1 Sheet, 4 Filters) | Mushroom Growing Supplies | North Spore

Worked the way we needed them to work

These are so nice since they can easily adhere over any hole that needs air filtered. I have a tub that has filters for it but they didn't fit right, one even put a small crack in the lid trying to pop it in (an $80 tub). So those were a pain to pop in and out depending on when we needed more ventilation. These helped so much!I already bought 2 packs and will be buying more once life atm chills out a bit. These will now always be my go to filters. So easy to use and replace when needed for a decent price

Items work as stated. 👍