Mushroom Spawn Bags — 0.22 Micron, 19"x8"x5", Qty 800

Bulk case of 800 grain spawn bags with a large 0.22 micron hydrophobic filter patch. The tighter pore size is what you want through a long sealed incubation — it keeps air moving while giving contaminants less to work with.

Gusseted bags measuring 19" x 8" x 5" in 3 mil polypropylene, thick enough to resist the micro-tears that are a common and hard-to-diagnose source of contamination in thinner bags.

Specifications

• Large single 0.22 micron filter ventilation window
• 19" length × 8" width × 5" gusset
• 3 mil polypropylene, autoclavable
• 800 bags per case

Why 0.22 micron: finer filtration for grain spawn, where the bag stays sealed for weeks and contamination protection matters more than raw air flow. For fruiting blocks, our double-patch 0.5 micron fruiting bags move more air.

Need a larger bag at this filtration? See the XL 24" x 10" x 5.5" version.