Top Cover Gasket Throttle Shaft O-Ring Kit for Fuel Injection Pump.Designed specifically for fuel injection pumps, ensuring fit and sealing performance.Includes top cover gasket and throttle shaft O-ring components for seal replacement Throttle Shaft O-Ring Kit for Fuel Injection Pump.Prevents fuel leakage and maintains proper pressure in the injection pump system.Manufactured with durable materials to withstand pressure fuel system conditions.Critical replacement parts for maintaining fuel injection pump efficiency and proper operation