Collagen casing is manufactured from 100% beef collagen of the highest quality. Features: 1) Caliber: 21 and 28 available at good price. 2) Packing: 15 meters shirred per stick. 3) Applications: sausages, frankfurters, salamis. 4) Overstuffing 5-7%. 5) Good bite. 6) Caliber stability..... Collagen Casing