Repair your fifth wheel components to their original working condition so you can be Ready for the Road Ahead , with the Holland FW67/FW69 Series Fifth Wheel Air Cylinder Rebuild Kit for XA-351-UB. Thanks to its precision-engineered components, this replacement set is the ideal choice to repair an air cylinder so that it can once again control the process of coupling two pieces of equipment. Manufactured with durable materials for long-term reliability. FleetPride is your First Click in Heavy Duty .