Amazing-us All in One Mushroom Grow Bag-50 count/Farm-Mushroom Spawn/Sealable Spawn/Myco BagsLarge size 8" X 5" X 19"0.2 Micron filter 3 Mil Polypropylenefor Substrate Autoclavable Presealable (50) : Amazon.ca: Patio, Lawn & Garden
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