Rocker Panel Mount:07-16 Silverado/Sierra New Body Style Extended/Double Cab w/ Half Size Rear Doors (Exclude Diesel) 5" Oval Tube Side Step Rail Nerf Bar Running Boards Installation: Bolt-On To The Rocker Panel Style: 5" Inch Oval Style Tube + Slip-Resistant Plastic Step Pads Item Offered: 2pcs 5" Oval Stainless Steel Side Step Nerf Bars + Mounting Hardwares + Installation Instruction Material: Made from heavy duty T304 Stainless Steel Surface finish: polished