{"product_id":"ptfe-breathable-membrane-filter-stickers-mushroom-cultivation-jar-lids-20mm","title":"32Pcs PTFE Breathable Membrane Stickers for Mushroom Jar Lids","description":"\n\u003ch2\u003e32Pcs PTFE Breathable Membrane Filter Stickers for Mushroom Cultivation\u003c\/h2\u003e\n\u003cp\u003eTake your mushroom cultivation setup to the next level with these high-quality \u003cstrong\u003ePTFE hydrophobic breathable membrane stickers\u003c\/strong\u003e. Designed for wide-mouth jar lids, these 20mm filter stickers allow fresh air exchange while blocking dust, water, and contaminants — creating the ideal environment for healthy mushroom growth.\u003c\/p\u003e\n\n\u003cp\u003eEach sheet contains \u003cstrong\u003e32 pre-cut, self-adhesive filter stickers\u003c\/strong\u003e ready to apply directly to your jar lids. Made from premium ePTFE film, they are non-toxic, high-temperature resistant, and built to last. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHydrophobic \u0026amp; Breathable:\u003c\/strong\u003e Blocks liquids, dust, and contaminants while allowing essential airflow for gas exchange\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePremium ePTFE Material:\u003c\/strong\u003e High-temperature resistant, non-toxic, UV resistant, and chemically inert for long-lasting use\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelf-Adhesive \u0026amp; Easy to Apply:\u003c\/strong\u003e Peel-and-stick design for quick, mess-free application on wide-mouth mason jar lids\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMicropore Technology:\u003c\/strong\u003e Dense, uniform micropore distribution blocks dust while maintaining breathability\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Balancing:\u003c\/strong\u003e Helps equalize internal and external pressure around sealed parts, protecting seal integrity\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuick-Recovery:\u003c\/strong\u003e Air permeability is rapidly restored even after contact with water, oil, or other liquids\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThin \u0026amp; Lightweight:\u003c\/strong\u003e Discreet profile that fits seamlessly into your cultivation setup\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Use:\u003c\/strong\u003e Ideal for mushroom cultivation, home plant propagation, wide-mouth jar lids, and more\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 32 pcs per sheet\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 20mm (approx. 0.8 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e ePTFE (expanded polytetrafluoroethylene) film\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mushroom cultivation jars, plant propagation lids, equipment venting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Sheet of 32 synthetic breathable membrane filter stickers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1pc-400cm-sealing-tape-faucet-sealing-tape-oil-free-leak-proof-water-pipe-gas-pipeline-sealing-tape\"\u003eLeak-Proof Sealing Tape for Pipes \u0026amp; Faucets\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1pc-extended-straw-vacuum-cleaner-aquarium-water-exchanger-simple-cleaning-tool-multi-functional\"\u003eMulti-Functional Extended Straw Cleaning Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1pc-10g-high-grade-silicon-grease-lubricant-o-lubrication-good-odorless-smoothness-for-o-rings-tube-silicone-grease-lubricant\"\u003eHigh-Grade Silicone Grease Lubricant for O-Rings\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Size is measured by hand; minor measurement variations may occur. Product color may appear slightly different from images due to individual monitor settings.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.nutrition.gov\/topics\/shopping-cooking-and-food-safety\" target=\"_blank\" rel=\"noopener\"\u003eNutrition.gov on cooking and food safety\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What are these breathable membrane stickers used for in mushroom cultivation?\u003c\/h4\u003e\n\u003cp\u003eA: These PTFE breathable membrane filter stickers are designed to cover the vent holes or lids of wide-mouth mason jars used in mushroom cultivation. They allow essential gas exchange (fresh air in, CO₂ out) while keeping out dust, mold spores, and water droplets — helping maintain a clean, sterile growing environment for your mushroom substrate.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Are these filter stickers reusable or single-use?\u003c\/h4\u003e\n\u003cp\u003eA: These stickers are primarily designed as a single-use, peel-and-stick solution for easy and sterile application. However, thanks to the durable ePTFE material, the membrane itself is resistant to water and chemicals, making it long-lasting once applied to your jar lid.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What size jar lids are these compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: Each membrane sticker is 20mm (approximately 0.8 inch) in diameter, making them suitable for standard wide-mouth mason jar lids. They are ideal for covering pre-drilled vent holes typically used in mushroom cultivation jar setups.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Are these stickers heat-resistant for pressure cooking\/sterilization?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The ePTFE material is high-temperature resistant, making these stickers suitable for use in setups where jars undergo sterilization processes. However, we recommend applying the sticker after sterilization for best adhesion results.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What are these breathable membrane stickers used for in mushroom cultivation?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"These PTFE breathable membrane filter stickers are designed to cover the vent holes or lids of wide-mouth mason jars used in mushroom cultivation. 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