Product Details: The Donaldson Power Steering Filter is designed to provide superior protection for your vehicle's power steering system. This filter is designed to trap and remove contaminants like dirt and debris that can cause wear and tear on your power steering system. This filter is designed to fit perfectly in your Mack vehicle. It has an efficiency rating of 9 micron, which means it can effectively trap and remove particles as small as 9 microns. This filter helps to maintain consistent and smooth steering performance so that you can drive with confidence. FleetPride is your First Click in Heavy Duty®.