Reusable Nylon Mesh Bag fits perfectly inside of a converted Sankey Keg, and is more than large enough to hold all of your grain! This is a "Must Have" accessory for homebrewers and is durable enough to be used over and over again. If microbreweries could use this kind of a mash tun liner, they would! Eliminates stuck mashes because bag can be easily lifted and previously stuck grain made to float again in the mash tun. This is much easier than trying to stir grain loose from a clogged screen, and much safer than trying to put your hand in a hot mash tun to adjust the screen(not recommended). This is the same great Mash Tun Liner we include with our world class brewing systems!