The Donaldson P550138 is a high-performance spin-on hydraulic filter designed to protect critical hydraulic systems from contaminants. Featuring a 10 micron synthetic media, it ensures efficient filtration and extends component life. This genuine Donaldson filter has an outer diameter of 93 mm, a length of 138 mm, and a 1 3/8-12 UN thread, commonly used in various agricultural and construction equipment from brands like Caterpillar, John Deere, Komatsu, AGCO, New Holland, Massey Ferguson, Challenger, Fendt, and Valtra.