These 20x45cm, 4.72mil thick PE mushroom growing bags come in a package of 10. With a 0.2 micron filter patch and tear-resistant, sealable design, these bags are perfect for growing or spawning a variety of bacterial mushrooms and ganoderma mushrooms. The clear bags help detect contamination early and reduce space needed compared to trays or tubs. These bags can shorten the mycelial fermentation cycle and are autoclavable for easy sterilization. Features 1. Size and Package: 10 pcs of 2045cm, 4.72mil thick grow bags that allow plenty of room for mushroom growing and spawn, substrate and fruiting. 2. Excellent Filtering: 0.2 Micron filter patch allows for gas to freely be exchanged, while keeping contaminates out. The clear bag helps to quickly spot any instances of contamination. 3. Grow like a pro mushroom growers around the globe use these bags to dramatically reduce space needed to grow or spawn mushrooms when compared to trays, tubs. 4. Using these plant grow bags for running spawn, and the mycelial fermentation cycle can be shortened. Fit for many kinds of bacterial mushrooms and bamboo fungus ganoderma mushroom, also apply to wood chips. 5. 4.72mil Sealable Bags, tear resistant, made of PE, autoclavable and durable. Specification Material: PE Color: White Size: 2045cm, 4.72mil Thick Weight: 105g Package Include: 10 Mushroom Growing Bags