3" Round Black Carbon Steel Side Step Rails Nerf Bar Running Boards Fit 99-13 Chevy Silverado/GMC Sierra Extended Cab (w/ Half Size Suicide Style Rear Doors) ) Fitment: 1999-2013 Chevy Silverado/GMC Sierra 1500/2500/3500/1500 HD/2500 HD/3500 HD Extended Cab Which Has Half Size Suicide Style Rear Doors Only Item-offered: 2pcs 3" Round Carbon Steel Side Step Nerf Bars + Mounting Hardwares + Installation Instruction Installation-type: Direct Bolt-On Surface-finish: Black Powder Coated Material: Made From Heavy Duty Carbon Steel