Westin 2015-2018 Chevrolet/GMC Colorado/Canyon Crew Cab E-Series 3 Nerf Step Bars - BlackWestin(TM) E Series Nerf Bars are made of 3in. diameter round tubing and are vehicle specific designs. Step design and mounting technique varies by application (mounting kit included). They feature recessed area mounted step pads unique to E Series Nerf Bars feature the Westin(TM) brand name and are UV resistant. E Series 3 Round Nerf Step Bars; Dual Step Pad; Black; Steel; Mount Kit Included; 3 in. Round Tube