****Please confirm your size before making purchase. MEASURE This gasket will only fit extra large sausage stuffers that have a 10 inch diameter tank. **They do NOT fit the common 20 lb stuffer that uses the 8 1/2" gasket This gasket fits around the round plunger that presses into the cylinder. The diameter of the gasket is approx 10". Measure the diameter of your tank to compare. Single grooved to slip onto plunger. Fits many brands of 30 quart stuffers but please measure prior to purchase. Measure the diameter of your tank prior to purchase. We also have gaskets for the standard 5 1/4" and 8 1/2" cylinders. Stock up! Additional gaskets ship free with first one. PLEASE NOTE: This gasket will NOT fit the standard 5 1/4" or 8 1/2" tank that is sold by Weston, Cabelas, LEM, VIVO, VEVOR and others. It ONLY fits extra large 30 lb + tanks that are approx 10 inch diameter. View our complete store at https://www.ebay.com/str/butcherbaker