DescriptionSpark plug caps are a important part of gasoline generator. The purpose of spark plug cap is to seal the spark plug against the engine block. Spark plug caps feature plastic construction providing a lasting durability. Easy to install and use.Features-Color:Black -Material:Plastic -Size:8.30X2.20X2.20cm/3.26X0.86X0.86in - Spark plug caps are made from plastic material, designed to withstand mechanical stress, as well as resist corrosion and wear. - Replace yours cracked plug cap with this for easier jobs of changing your spark plug. - High performance spark plug caps are available for gasoline engines, offering superior insulation. - Unique design, help you take the boot off spark plug. Fit for your gas generator, lawn tractors and pressure washer. - Spark plug caps are effective and simple way to improve engine performance.