These Stuffing Tubes fit the Sausage Maker 15, 20, 25, and 30 lb Sausage Stuffer. Set of 3 Tubes Connecting Point Diameter: 2" Tube Length: 7 1/2" Outside Diameters: 5/8", 7/8", 1 1/16" (where casing is applied to tube). Inside Diameters: 1/2", 3/4", 1 1/16"