Product Details: Prepare your semi truck to be Ready for the Road Ahead™, with the Neapco 1350 Series Double Cardan Head Assembly that ensures an effective transfer of rotational energy. By utilizing a sophisticated design, this replacement joint is able to transfer rotational energy between two shafts that are not in perfect alignment. Constructed with rugged materials to reduce vibration and minimize power loss. FleetPride is your First Click in Heavy Duty®.