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The vermiculite in the mix helps retain moisture evenly and the open structure aids CO₂ escape — just like aerating a risotto
13mm does not mean it fits a 13mm opening
biology nerds
or prevent any disease
Traditionally used to support long-term wellness
Mason Jar Spawn / Liquid Culture Lids (12) w/ Injection Port and Gas Exchange Filter Size:Regular Mouth Spawn Jar Lids The vermiculite in the mixEach order includes 12 lids designed specifically for mushroom spawn and BRF jars. These lids feature an embedded silicone ring to prevent contamination. Each lid is equipped with a 13mm self healing injection port and a . 22 micron gas exchange adhesive filter. Available for both Regular Mouth and Wide Mouth jars. Please note that jar bands are not included, and lids should be handled carefully to avoid bending.