The Cat 3866124 is a genuine High Efficiency Fuel Filter designed to provide superior protection for Caterpillar engines and fuel systems. This primary fuel filter features a durable cellulose and synthetic media for advanced contaminant removal and a reliable radial seal. With an outer diameter of 114.3 mm, an inner diameter of 50 mm, and a height of 215.9 mm, it ensures precise fitment and optimal performance for various Cat excavators, wheel loaders, dozers, and telehandlers.