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  • 5"(gusset) x20" (long)x 8”(wide), typically for 5 -8 pounds block
  • 0.5 micron filter patch
  • Heavy duty 3 mil polypropylene
  • Sealable, Autoclavable and Durable
  • More quantities? contact us!


Sealable and autoclavable, 3 mil polypropylene bags with 0.5 microporous filter patches that allow gas exchange but preclude the passage of contaminants, can be used for both mushroom growing and spawn .

They are widely used by mushroom growers throughout the world. We use them for mushroom spawn incubation in our farm for a long time. You can seal them with an impulse sealer, or just tie to seal them. Those bags are durable and can be reusable in most circumstances.

These bags are gusseted on both sides, allowing them to hold more material. The Size makes those bags ideal for using pressure cookers to sterilize. You can use them to expand your cultures or replace the jars. Substrates are easy to view, and easy to handle.

8"X 5"X 20"/0.5 Micron/3 mil/Mushroom Spawn/ growing bags

    • 8"(gusset) x 5”(wide)x19" (long)
    • 0.5 micron filter patch
    • Heavy duty 3 mil polypropylene
    • Sealable, Autoclavable and Durable
  • Returns

    We accept any returns made within 10 days of the purchase date. To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.



    Once your return is received and inspected, we will send you can email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.

    If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days. Please note that Shipping and handling charges are not refundable.


    Sale items

    Only regular priced items may be refunded, unfortunately sale items cannot be refunded.



    To return your product, please mail your product to:

    14007 SE Allen Rd. Bellevue, WA 98006.

    You will be responsible for paying for your own shipping costs for returning your item.

    If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.

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