Features 1. Size and Package: 30 pcs of 5015cm, extra 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. Sealable bags, tear resistant, made of PE, autoclavable and durable. Specification Material: PE Color: White Size: Mushroom Growing Bag 5015cm, Sticker 2.51.4cm Weight: 305g Package Include: 30 Mushroom Growing Bags 30 Stickers