Feature(may vary by option.)

●Diameter:58mm,0.3um Pore size,Hydrophobic PTFE membrane ,waterproof and air exchange for Mushroom cultivation,best for mycology jar lid .
●Strong adhesive:these 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 resistance:these disc filters feature outstanding heat resistance and pressure resistance, which can be applied to your autoclaves,press cooker and steam sterilizer.
●High filter rate: these adhesive patches have a filtration rate of 99.97% ,can filter 0.3 μm object ,for gas exchange
●Easy to apply:breathable,durable and reusable

[20mm(64pcs)]

[58mm(24pcs)]

[90mm(12pcs)]

[65mm(18pcs)]

[82mm(18pcs)]

Description

Specifications: Size: 58 mm in diameter Color: white Membrane material:Hydrophobic PTFE Pore size:0.3um Package includes: 3 x8sheets Synthetic filter discs Features: Waterproof ,breathable,high temperture and press resistance,reuseable. 24pcs filter sticker Included ,Great for the for all mushroom growers looking to provide a sterile growing environment with proper air exchange. These filter vent work great for a variety of growing techniques including BRF Jars, Liquid Culture, Spawn Cultivation and may more. Safe for Pressure Cooking and Autoclave Sterilization.