Mifeier Rocker Panel Mount 3" Black C/S Side Step Rails Nerf Bars Running Boards Fit 07-17 Silverado/Sierra Crew Cab (4 Full Size Doors) Pair Fitment:2007-2017 Chevy Silverado 1500,2500 HD,3500 HD/GMC Sierra 1500,2500 HD,3500 HD New Body Style Crew Cab Pickup Only (Will Not Fit Diesel Model With DEF Tank) Item offered, 2pcs 3" Round Carbon Steel Side Step Nerf Bars + Mounting Hardwares + Installation Instruction Installation Type, Rocker Panel Mount (Bolt-On to the Rocker Panel) Surface Finish, Black Powder Coated Material, Made from heavy duty Carbon Steel