Description: 【Compatibility】】: Specifically designed as a direct replacement for Ford 8N, 2N, and 9N tractors 1939-1950 models. This high performance spark plugs, with part number A437 to get your vintage machine running smoothly again 【Wide Applications】】: An ideal choice for a range of heavy duty equipment, including generators, welders, air compressors and skid steers 【Outdoor Power Equipment】: Tractor Spark Plugs bring new life to your lawn and garden machinery 【Construction】: Engineered from quality metal materials to resist corrosion and fouling. These spark plugs are built to last, powerful spark for improved engine startup, enhanced efficiency, and stable performance under demanding conditions 【Complete Set of Four】: This package contains a full set of 4 spark plugs, providing everything you need for a complete tuneup. Please check your owner's manual or compare your old plug to our specifications and compatibility list before ordering Size Chart: Packing size: 10cmx10cmx2.5cm/3.94inchx3.94inchx0.98inch Package Includes: 4 Spark Plugs Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you!