The Caterpillar 1R1804 is a genuine OEM Advanced Efficiency Secondary Fuel Filter designed to provide superior protection for your engine's fuel system. Featuring a 4-micron cellulose media, this filter effectively removes contaminants, ensuring clean fuel delivery and optimal engine performance. With a length of 265.9 mm and an overall diameter of 107.2 mm, it is equipped with a 1-14 UNS-2B thread and a reliable gasket seal. This secondary fuel filter is essential for maintaining the longevity and efficiency of a wide range of Caterpillar articulated dump trucks, excavators, wheel loaders, and other heavy machinery.