The Donaldson P551421 is a high-quality Spin-On Fuel Filter designed to provide superior protection for fuel systems in a wide range of agricultural, construction, and industrial machinery. Featuring a 10-micron cellulose media, this filter efficiently removes contaminants to ensure clean fuel delivery and optimal engine performance. It has an outer diameter of 93 mm, a length of 122 mm, and an M16 x 1.5 thread size. This genuine Donaldson filter is a direct replacement for numerous OEM part numbers, including Caterpillar 1R0750, John Deere RE509031, and Volvo 11708551, making it a versatile and reliable choice for maintaining fuel system integrity.