ITEM DESCRIPTION: 5pc 22mm Carburetor Diaphragm Kit (includes needle & hardware) used on GY6 125 & 150cc engines found on various Scooters, ATVs, Sand / Dune Buggies & Trikes. NOTE: The PD24 carb uses either a 22mm or 24mm slide depending on production date. (I have the 24mm slide in another listing), be sure to measure your old one before ordering.