Prepare your semi to be Ready for the Road Ahead , with the Holland 14.875" - 18.75" ILS Series Fifth Wheel Air Cylinder Rebuild Kit that provides enhanced fifth wheel security. By actuating the locking mechanism of the fifth wheel assembly, this piece is able to prevent trailers from disconnecting or rolling away. Manufactured with a multipurpose design to suit a number of makes and models. FleetPride is your First Click in Heavy Duty .