They are so easy to make.
Use schedule 40 (potable water grade) pvc.
Cut one 2" diameter piece to 8" in length
Cut one 1" diameter piece to 11" in length
Attach a 1 1/14" pvc cap to one end of the 1" pvc
cut a food friendly plastic disc to fit the inside of the 2" diameter piece.
Attach the disc to the smaller 1" section of pvc
You can really make them any length or diameter that you want.
I roll my fatties inside of a one gallon baggie.. the baggies are about 10" across..
keep that in mind when you choose a length for your piston.
I stuff the piston with filling up to 2 inches from the top (for a fatty).
chill any cooked filling before laying on top of the sausage...
Not necessary for fattie making but so much fun to use. :)