Prepare your semi to be Ready for the Road Ahead™, with the NTN 3.24" x 1.42" Steel Tapered Roller Bearing Cone that provides a smooth surface for roller bearings. To help reduce the amount of friction between two mechanical components, this replacement piece is crafted with a cone-shaped design. Fashioned with case carburized steel material for enhanced durability. FleetPride is your First Click in Heavy Duty®.