Westins Pro Traxx 4 Oval Nerf Step Bars feature a 4" oval tube with a heavy-duty step pad that provides a wider and more secure step area. They feature 30° factory style bends that have seamless domed ends so there are no end-caps or exposed bolt heads. Applications are bolt-on installation. Silverado/Sierra 1500 Double Cab 2019 (Excl. 2019 Silverado LD/Sierra 1500 Limited) Silverado/Sierra 1500 Double Cab 2019 (Excl. 2019 Silverado LD/Sierra 1500 Limited); 2500/3500 Double Cab 2020