2001-2014 GM 1500/HD CC E-Series 3" Round Black Nerf Step Bars (WES23-1955)Westin E Series Nerf Bars are built using 3 inch diameter round steel tubing to provide a stable step and a clean, classic look. These bars serve a dual purpose by facilitating easier vehicle access and protecting your rocker panels from potential road damage. The design includes unique recessed step pads made from UV resistant, injection molded polymer to ensure a durable, non slip surface that stands up to environmental exposure without fading.