1999-2014 GM 1500/HD Extended Cab E-Series 3" Round Black Nerf Step Bars (WES23-1685)Westin E Series Nerf Bars are constructed from 3 inch diameter round steel tubing to provide a dependable step and a rugged look for your truck. These bars are designed to protect your vehicle rocker panels from potential road damage while ensuring easy access to the cabin. The unique recessed step area features UV resistant, injection molded polymer pads for a durable, non slip surface that stands up to the elements. Features Traditional 3 inch round