PP gusseted bags with 0.2µm filter patch. Autoclave-safe to 121°C.
10 polypropylene spawn bags (20×12×45 cm) with integrated 0.2 µm filter patch. Cast polypropylene (CPP) — NOT BOPP — so they survive autoclaving at 121°C/15 PSI without melting.
Filter patch allows gas exchange while preventing contamination. Fill with grain, sawdust, or straw substrate, fold and seal with impulse sealer or fold-over clips, then autoclave.
Critical: these are CPP, which is the correct material for autoclave bags. Regular polyethylene bags will melt.