Mifeier 3" S/S Side Step Rails Nerf Bars Running Boards Fit 01-13 Chevy Silverado GMC Sierra 1500 Crew Cab (with 4 Full Size Doors) 2001-2013 Chevy Silverado/GMC Sierra 1500/1500 HD/2500/2500 HD/3500/3500 HD Crew Cab With 4 Full Size Doors Only Material: Made from heavy duty T304 Stainless Steel Style: 3" Inch Round Style Tube + Slip-Resistant Plastic Step Pads Item offered: 2pcs 3" Round Stainless Steel Side Step Nerf Bars + Mounting Hardwares + Installation Instruction Direct Bolt-On installation