For use inside the malt pipe, the 10.5 Gallon Foundry™ Brew Bag® is a durable, reusable brewing tool made from 400-micron food-safe fabric (for use inside the malt pipe) designed for consistent recirculation and easy cleaning. Perfect for the Foundry™ Brewing System, it prevents pump clogs, holds over 100 lbs. of grain, and features reinforced seams for long-lasting use. The last brew bag you’ll ever need!