Use for straining, crushing, and pulp fermentations. The small straining bag has a very fine mesh and can hold a pound or two of fruit for pressing. The large straining bag has a very fine mesh, and is big enough to line a bucket or the basket of our Mini Press. The Brewmaster filter bag is approximately 12" x 22" with a curved bottom. It fits onto a 6.5 gallon bucket and is secured with an elastic strap. Large, small, fine, and coarse - bags for every purpose