Features: 1.Fitment: Pre filter fuel filter kit is specially designed, replacement for Airdog 100 150, filter retainers need to be removed from the base. 2.OE Number: The package includes 1pc Pre Filter WS100 and Fuel Filter FF100 2 Combo Pack, for Donaldson P551315, P550550 reference OE number. 3.Function of Pre Filter: The pre filter reduces the amount of dust and impurities entering the intake system, keeping the air filter clean and making the engine run more powerfully. 4.Function of Fuel Filter: Fuel filter is used to prevent particulates, water and impurities in the fuel and protect the precise components of the fuel system from wear and other damage. 5.Direct Replacement: Professional manufacturing, high performance, strong reliability, direct replacement for the old or broken pre filter and fuel filter. Specification: Item Type: Fuel Filter_x000D_ Material: Metal_x000D_ OE: For Donaldson P550550, P551315_x000D_ Function: The pre filter reduces the amount of dust and impurities entering the intake system, keeping the air filter clean and making the engine run more powerfully. During use, it protects the intermediate and advanced filters at the back, prolongs the life of the filters at the back, and saves maintenance costs._x000D_ Fuel filter is used to prevent particulates, water and impurities in the fuel and protect the precise components of the fuel system from wear and other damage_x000D_ Fitment:_x000D_ Replacement for Airdog 100 150 Note: 1. Please double check the part number of your item, matching information is for reference only._x000D_ 2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!