Each kit includes all the necessary components to repair a carburetor. ATV models with two carburetors include components to repair two carburetors. Kit includes all O-rings, gaskets, jets, needle, mixture screw, float bowl screws, float valve needle and seat. OEM jet sizes are included in the kit. NBR rubber material is used on all O-rings and rubber gaskets NBR has excellent resistance to the ethanol used in today's fuels. Applications that use paper float bowl gaskets are upgraded to High Performance Interface Gasket material. Components included in the kits are based off US models and discretion must be used when attempting to install the kit on a non-US model. Off road use only.