Crafted from breathable cotton materials, these withstand humid conditions while ensuring consistent airflows—a must have upgrade for reliabled mushroom cultivation supplies Use these filter discs in monotub cultivation systems to a resistant environment during colonization and fruiting stage of gourmets or medicinal mushrooms 24 high airflows cotton pad (2mm thick) designed for optimal exchange in mushroom cultivation, maintaining ideal humidity while promoting mycelium growth in monotub setups Ideal for home mycologists, commercial growers, and DIYer enthusiasts seeking efficient monotub ventilation solution for mushroom substrate maintenance Each 2.95 inch adhesive disc features backing for easy installation, eliminating the need for poly film or micropore tape, and fits standard 2.5 inch monotub air holes with universally compatibility across Myco series and DIYer tubs, Manufacturer: Jazuaiao