Equip your semi truck to be Ready for the Road Ahead™, with the Prima Brake Components 21-3/8" Tailgate Cylinder, a key set that offers enhanced tailgate control. By utilizing a specialized design, this replacement cylinder is able to pair with an air compressor to control the movement of a pneumatic or hydraulic tailgate. Built with durable materials to be suitable for commercial vehicles, tractors, and more. FleetPride is your First Click in Heavy Duty®.