The Donaldson 3.94" Spin-On Full Flow Lube Filter is designed to provide longer filter life and increased engine protection. This filter is designed to reduce operating costs and deliver lower restriction to provide maximum oil flow and lubrication. It has double the contaminant carrying capacity of standard cellulose filters, allowing for much longer life. It removes more than 99% of contaminants that are 45 microns or larger, ensuring your engine is protected from harmful particles. FleetPride is your First Click in Heavy Duty®.