0.2 Micron Synthetic Filter Papers/fit for Wide Mouth jar lids/Used for Mushroom Cultivation/Pack of 12

***It is made of non-woven polypropylene with PTFE,which has been used as filter patches for mushroom growing bags for a long time.******0.2 micron filter means it has a filtration rate of 99.98%******These filters are one of the best choices for your mushroom cultivation, especially for long term incubation projects. as a nature of the material, those filters can be used within a pressure cooker, steam sterilizer or autoclave. they are reusable and highly durable.******The filters are thin, you can very easily adapt them to other sizes and containers.*** When you stick the filter paper to other surface with glue, please make sure apply glue only on the PTFE membrane side, which you feel smoother than the other side.

• 0.2 microns Laminates of non-woven polypropylene with PTFE membrane.The same material as filter patches for mushroom growing/spawn bags
• Diameter: 86 mm, designed for 90mm wide mouth jar lids, you can also DIY them into regular mouth size or any other smaller sizes
• Autoclavable & reusable