About This 【Packaging Content】You will receive 20 Mushroom Grow Bags, Which is Enough for your Daily Grow and Research 【Self-Sealing Injection Port】The built-in self-healing injection port enables contamination-free inoculation—no need to open the bag! This feature helps maintain a sterile growing environment for optimal results. 【Spacious Design】Mushroom Grow Bags (8" x 5" x 20") with a 6 mil thickness that provides ample space for substrate and fruiting while ensuring durability throughout the growing process 【Excellent Filtering System】Featuring a 0.2 Micron filter patch, our mushroom cultivation bags allow for optimal gas exchange while effectively preventing contaminants from entering, ensuring a clean and healthy growing environment 【Wide Application】These mushroom planting bags are mainly used for inoculation of cloned oyster mushrooms, bamboo fungus, ganoderma lucidum and so on. Perfect for school projects, indoor gardening, greenhouses, farms, and family hobbies, and even professional mushroom growers Overview Material : Polypropylene (PP) Color : Transparent Special Feature : Breathable Style : 20 Packs With injection port Planter Form : Bag