Synthetic Filter Paper Stickers-20mm Diameter,0.25Micron Filter,Used For Mushroom Cultivation, Place Under The Mason Jar Lids

Item Package Quantity: filter paper for mushroom cultivation
Size: 0.25 microns filter, 20mm diameter.It can let in fresh air and avoid some bad items.
Good material：These filter papers are resistant to high temperature and high pressure. It can be used in autoclaves, steam sterilizers or autoclaves.Autoclavable & reusable
Instructions for use：You can paste it into the hole under the wide-mouth can lid. Smear the surface, and then paste the sticker. The use of these papers allows for fresh and continuous air exchange while preventing unnecessary contaminants from entering.
Scope of application：These filters are widely used by commercial producers and those involved in small family planting.