The Donaldson P550938 is a high-quality spin-on fuel filter designed to provide superior protection for diesel engines. Featuring a cellulose media, it effectively removes contaminants down to 10 microns, ensuring clean fuel delivery and optimal engine performance. This filter has an outer diameter of 93.5 mm, a length of 176 mm, and an M20 x 1.5 thread size. It is a direct replacement for various OEM part numbers including Caterpillar 1R0750 and John Deere RE509031, fitting a wide range of agricultural and construction equipment.