Features:How long it can keep: Dry Sheep Casing save in 2 to 3 years in constant temperature avoiding sunshine. Specifications:Material: Sheep Intestine MaterialColor: shown as picturesSize: diameter 18 mm, length 14 meters (one)How to use: The dry sausage casing need to put a little bit food grade oil in the tube before filling because dry casing has less elasticity than salted sausage casing. Put the casing into water in a very few seconds and then can use or it can be used after dip in water less than 3 munites. Package includes:1 X Tubular Sheep Sausage CasingNote: The dry sausage casing can be eaten after finish making.It will be soften after cooling and drying it. Also it will not have the taste of casing. Some buyers mentioned it's easy to break when they fill the sausage. And they may not pay attention to the filling method or using the tube to fill the meat too fast. When stuff the meat manually, you can do it by separating some small parts.Then you use toothpicks to make the small air bubble after finish filling.Note: 1.Transition: 1cm=10mm=0.39inch2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you