Package include: you will receive 64 pieces synthetic filter paper stickers in 20 mm diameter and 100 pieces 20 mm stopper for 13.2 mm diameter opening mason canning jar lids
Nice performance: these disc filters feature outstanding heat resistance and pressure resistance, which can be applied to your autoclaves
High filter rate: these mushroom disc filter can filter 0.3 μm object and can ensure the circulation of internal and external air, indispensable items for your mushroom cultivation
Vial rubber stopper: these vial rubber stoppers are made of rubber, not easy to deform, durable, washable, reusable, corrosion resistant, and can be applied for seal the vial containing most kind of liquid or solid
Apply for: these synthetic filter paper can be attached to the hole of wide mouth canning jar lids and you need to clean and dry the surface before sticking synthetic filter paper
