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These 10" x 5" x 24" Type A Filter Bags are often used with substrate for mushroom production and holds about 10 pounds of substrate. This side-gusseted breathable bag from Unicorn Bags gives a sturdy stand-up bag after filling and a strong bottom seal. Unicorn Bags manufacture it with equipment they designed and with proprietary additives, Unicorn Bags are pliable at any temperature as well as after sterilization. The bag opening is designed for easy sealing and the bag's bottom seal can withstand agitation.