Nitta Edible Collagen casings for sausage making are easy to stuff. They are uniform in size and can be used for fresh or smoked sausage. Made of beef protein. Typical use for this size is fresh or smoked sausage. 32 caliber. Now there is only one strand in package (picture shows three, new photo to come). Use 19 mm horn. Inside diameter is 21.36 mm. Stand is 60 ft. long. Sausage Stuffing capacity for these casings is approx. 28 lbs. per package. Stuff casings dry on a dry surface. Made in the USA.