Mushroom Growing Bags Injection portMycelium Substrate High Temperature W 8″ x L 19”Perfect for grain spawn, rye grain, wood chips, and various substrates. 8″ Wide 4.7″ Gusset 19″ Long Ideal size to grow mushroom bags at home, fits perfectly into a Pressure cooker, and the transparent mushroom bags makes it easy to observe the growth of the mushrooms and it is easy to be stored. Specifications:Color: TransparentMaterial: PolypropyleneThickness: 0.06mmAir vent window size: 2” x 2”Air vent window aperture: 0.2umSuper DurableMade from a thick Polypropylene Material: this thick polypropylene material will still not easy to crack or break, provides 100% protection of your mushroom. Temperature resistant Will easily hold up in temperatures of up to 130 C/266 F in a pressure cooker. Advanced Filtration 2” x 2” filter patch, 0.2 Micron Filter – allows for gas exchange while keeping contaminants out. Easily to SealYou can easily seal these bags with either a heat sealer or just tie them off with a zip-tie. Note:1.Please allow 1-5mm error due to manual measurement. 2.The colors may have different as the difference display.ALL SALES ARE FINAL !