Synthetic Filter Paper Stickers 20 mm 0.3 μm Filter Disc (pack of 32) Outstanding feature: these synthetic filter paper feature outstanding heat resistance and pressure resistance, which can be applied to your autoclaves How to use: these disc filters 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 Size information: these mushroom disc filter are approx. in 20 mm diameter and can filter 0.3 μm object Breathable material: these filter sticker can ensure the circulation of internal air and external fresh air, indispensable items for your mushroom cultivation Package include: different quantity sets of mushroom filter disc for you to choose, please check the quantity information carefully before purchase, ample quantity for you daily use, with the help of them, your mushroom can grow strong
