Large Presealable Gusseted Spawn Bags, B Filter

Presealable autoclavable bag with filter patch. Bags are used for spawn production, and used with Grain, wood, or can also be used invitro in some cases filling with a manure/straw mix for your dung/compost loving mushrooms. This bag Measures: 18" high * 8" wide * 5" deep and nominally 2.25 mil in thickness. B Filter .5 micron.