Prepare your semi truck to be Ready for the Road Ahead , with the Custom Hoists 6" x 155.75" Pin Mount 4-Stage Hydraulic Telescopic Cylinder that functions as a high-efficiency hydraulic cylinder. To reduce the need for excessive space and a large range of motion, this replacement device features a series of nested stages that collapse into one another. Fashioned with multiple durable components to tolerate extreme pressures. FleetPride is your First Click in Heavy Duty .