Diameter82mm,0.3um Pore size,Hydrophobic PTFE membrane ,waterproof and air exchange for Mushroom cultivation,best for mycology jar lid .
Strong adhesivethese synthetic filter paper can be attached to the hole of mason jar lids and you need to clean and dry the surface before sticking filter patch
High temperture resistancethese disc filters feature outstanding heat resistance and pressure resistance, which can be applied to your autoclaves,press cooker .
High filter rate these adhesive patches have a filtration rate of 99.97% ,can filter 0.3 μm object ,for gas exchange
Easy to applybreathable,durable and reusable
