Mifeier Rocker Panel Mount 4" Black C/S Side Step Nerf Bars Running Boards For 07-16 Silverado/Sierra 1500/2500HD/3500HD New Body Style Crew Cab (With 4 Full size doors ) Fitment:2007-2018 Chevy Silverado/GMC Sierra 1500/2500/3500 New Body Style Crew Cab With 4 Full Size Doors Only (Exclude Diesel Models w/ DEF Tank) Material: Made from heavy duty T304 Stainless Steel 4" Inch Oval Style Tube (The Caps On The Two Ends Are Made Of Rubber) + Slip-Resistant Plastic Step Pads Direct Bolt-On To The Rocker Panel,Professional installation is always recommended 2pcs 4" Oval Carbon Steel Side Step Nerf Bars + Mounting Hardwares + Installation Instruction