The Donaldson P557382 is a high-quality spin-on fuel filter designed to provide superior protection for diesel engines. With an outer diameter of 80 mm and a length of 135 mm, this filter features an M16 x 1.5 thread size and a 10-micron efficiency rating. It is a direct equivalent to Caterpillar 1R0750 and 1R0749, commonly used in various Caterpillar machines including the 420D, 420E, 430D, 430E, 432D, 432E, 434E, 442D, 442E, and 444E, as well as engines like the 3054, 3056, C4.4, and C6.6. This filter ensures clean fuel delivery, optimizing engine performance and longevity.