These Plastic Sausage Stuffer Tubes are 1 9/16" at the base where they connect to the sausage stuffer and are almost 6" long. Tube sizes are 1/2" (12mm), 3/4" (19mm), and 1" (25mm). Not tapered. 

For use with the 5 lbs Vertical Sausage Stuffer (LEM_606) and the Chop-Rite Brand as well.