【Reliable Quality】: This fuel injector is made of four materials. The stainless steel buckle has corrosion resistance and high strength. The PPS shell has high mechanical strength, chemical resistance, and electrical insulation, and will not be easily deformed or corroded. The nitrile rubber ring has oil resistance and sealing properties. The internal copper alloy has good conductivity, sensitive response, precise control, and effectively improves fuel efficiency and reduces fuel consumption. 【Replace Part Number】: 25-331-01-S, 2533101-S, 2533101S. 【Compatible with】: Kohler Command Pro Gasoline EFI Engines HP 37 35 33 29 27 25 21 19 14. 【Installation】: This fuel injector is very easy to install. First, remove the lawn mower casing, locate the engine, find the position of the oil inlet pipe on the engine, unscrew the fixing screw on the oil inlet pipe, unplug the oil inlet pipe, and find the fuel injector to replace it with a new one. 【Package Includes】: 2x Fuel Injectors. Brand Name LESHIAUTO Valve Type Fuel Injector Thread Type Standard Manufacturer LESHIAUTO Model Number WH-25331 Material Type Stainless Steel, PPS, Nitrile Rubber, Copper Alloy Connector Type Threaded Exterior Finish Stainless Steel Number of Ports 2 Included Components 2x Fuel Injectors Inlet Connection Type Threaded