Item Tag: 50Pcs Mushroom Bags
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50 Pack, Mushroom Grow Bags, Heavy Duty 6 Mil Polypropylene Mushroom Substrate B
Sealable and Durable: Mushroom substrate bags are made of polypropylene plastic designed to withstand high temperatures. The plastic is durable and clear enough to make monitoring growth easy. Can be sealed with an impulse sealer, or can just be tied to the seal.