Tyger Auto Custom Fit 2007-2017 Chevy/GMC Silverado/Sierra Crew Cab 5inch Wide 85inch Long Stainless & Alloy Running Boards Side Step Rails Nerf Bars (2pcs with Mounting Bracket Kit) IMPORTANT: Only fit Crew Cab with 4 full-size doors. NOT for Ext Cab with 2 full-size front doors & 2 suicided rear doors. NOT for Double Cab with 2 full-size front doors & 2 narrower rear doors.(Please check the Cab Size image above). 100% brand new 2 bars for both driver & passenger sides. All mounting hardware and DIY instruction included. Step bars are made of extruded aluminum with sturdy structure in black E-Coating for corrosion resistance. Aircraft grad stainless steel trim covers for lifetime shine. UV resistant non-slip 5inch wide step pads. Easy No-Drilling DIY installation in minutes. Lifetime warranty