Carburetor Repair Kit - Ski-DooNBR rubber material is used on all O-rings and rubber gaskets; NBR has excellent resistance to the ethanol used in today's fuelsKit includes all necessary O-rings, gaskets, jets, needle, mixture screw, float bowl screws, float valve needle and seatApplications that use paper float bowl gaskets are upgraded to High Performance Interference Gasket materialOEM jet sizes and slide needles are included in the kit