All diaphragms and gasket set components are manufactured from the same high-quality material as OEM, Includes all necessary O-rings, gaskets, jets, needle, mixture screw, float bowl screws, float valve needle and seat (needle jet and other pressed-in jets are not included), NBR rubber material is used on all O-rings and rubber gaskets; NBR has excellent resistance to the ethanol used in today's fuel, Components included in the kit are based off of US models and discretion must be used when attempting to install the kit on a non-US model, OEM jet sizes and slide needles included