To stuff snack sticks, either in sheep or collagen casings, you need a 3/8" stuffing tube for your stuffer. I was able to get one for an F. Dick stuffer that fit a 2" collar, but is no longer available from my source. However, I found that a 4-tube pack, item no. 318610051 from Bunzl Koch Supply that includes the 3/8" tube for an F. Dick stuffer. Contact Dawn Wollesen or Customer Service at 1-800-456-5624, they also might have individual tubes available, too. Tell 'em Pops sent ya!