Make uniformly sized fresh or smoked sausages with the LEM 21 mm Edible Collagen Casings 2-Pack. These casings are made from beef protein, replacing the need for natural hog or sheep casings. No preparation is necessary, as each casing can be put directly on a stuffing tube, holding approximately 10.5 pounds per strand when stuffed. LEM 21 mm Edible Collagen Casings 2-Pack - Food Processing at Academy Sports