The Caterpillar 1R1804 is a genuine Cat Advanced Efficiency diesel fuel filter element, engineered to provide superior protection for your engine's fuel injectors and pump. Featuring a robust cellulose and synthetic media, this primary fuel filter effectively removes small contaminants, ensuring clean fuel delivery and prolonged engine life. With a height of 173.7 mm and an outer diameter of 83.8 mm, it is designed for a precise fit with a 13/16-18 thread size. This filter is commonly used across a wide range of Caterpillar engines, excavators, wheel loaders, and other heavy machinery, ensuring reliable performance and durability.