Just slide casings onto this snack stick nozzle For those who prefer snack sticks. The 3/8" nozzle accepts 17mm to 21mm collagen casings and natural casings. The tube is made of stainless steel and is 3/8" in diameter. Add this snack stick nozzle to your Jerky Cannon or Jerky Gun so you can pre-make perfect snack sticks every time. LEM products allow everyone from butchers, restaurants and the at-home meat processor to make delicious sausage, jerky, and other meat products to your liking.