Donaldson offers a full range of filtration solutions for heavy‑duty engines and equipment—everything from air and oil to fuel and hydraulic filters. With proprietary media designed to balance long life and high efficiency, these filters are built to perform in demanding conditions, protect critical components, and help keep your equipment running with less downtime. FleetPride is your First Click in Heavy Duty®. [DONALDSON AIR OIL SEPARATOR, M22 x 1.5"]