These are Wide Mouth Mason Jar Lids w/ Rubber Stopper Self Healing Injection Port + Gas Exchange Port. Just fill with your grain spawn medium, cover your lids with aluninum foil, and place in your Pressue Cooker for an Hour and a Half! Let Cool then INject with your favorite species of Mushroom Culture.


6 LIDS FOR 25.00$

12 LIDS FOR $35.00 



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    Ask me for a custom order. Grow kits, Grain Spawn, etc. I will be happy to sell it it I have it available. My products are made in front of laminar flow hood and a very clean environment