They are used in the meat industry as natural casings in the production of smoked sausages, boiled, steamed, semi-dry and dry. They are the pig intestines which are used to produce “Silesian” sausage, “Rzeszowska” sausage, raw – Polish, German – “Bratwurst” or Finnish “Grilli “. They are used for products intended for direct cold consumption, or grilling and frying. Unlike plastic casings, pig intestines are edible. The intestines are light-grey. Casings made from the intestines are very flexible and uniform. Natural intestines contain large amounts of collagen.