The Donaldson P550688 is a genuine spin-on fuel filter and water separator designed to protect sensitive fuel system components from contaminants. Featuring a 10 micron efficiency rating (99%), this filter ensures clean fuel delivery. It has an outer diameter of 93 mm, a length of 175 mm, and a 1-14 UN thread size. The gasket has an outer diameter of 71 mm and an inner diameter of 62 mm. This high-quality filter weighs 0.68 kg and is a direct replacement for various OEM part numbers, including Caterpillar 1R0750, Cummins 3315843, and Detroit Diesel 23527065.