Sized for use with a #8 grinder, the Heavy-Duty Plastic Stuffing Tubes are slightly tapered, long lasting and easy to clean.  Measures 2 9/16" at the base with a 3/16" lip or a 3/4"lip. Use 3/8" tube to stuff sheep casings and 19-26MM collagen casings.  Use the 3/4" tube for hog casings, 32mm collagen, or fibrous casings.