Mifeier Fit: 07-16 Silverado/Sierra Double/Extended Cab New Body 4" Black Side Step Nerf Bars Running Boards 2007-2018 Chevy Silverado/GMC Sierra 1500/2500/3500 New Body Style ExtendedCab (Exclude Diesel Models w/ DEF Tank) Material: Made from heavy duty Carbon Steel 2 Year Warranty Against Rust And Corrosion Direct Bolt-On To The Rocker Panel 2pcs 4" Oval Carbon Steel Side Step Nerf Bars + Mounting Hardwares + Installation Instruction