Prepare your semi to be Ready for the Road Ahead , with the Jost Fifth Wheel Low Lube Liner Plate Replacement Kit that updates your fifth wheel plate to its original condition. Due to its wear-resistant design, this replacement component is able to seal the top plate to prevent dirt and debris from entering the mechanism. Crafted with long-lasting and durable materials to deliver an extended service life. FleetPride is your First Click in Heavy Duty .