MaxMate Premium Custom Fit 01-Up Silverado/Sierra Crew Cab Black 4" Straight Side Step Rails Nerf Bars Running Boards(2pcs with Mounting Bracket Kit) IMPORTANT: Only fit Crew Cab with 4 full-size doors NOT for Extended Cab with 2 full-size front doors & 2 suicided 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 heavy duty Black Powder-Coated 4 inch oval tubing rust resistant! UV resistant non-slip wide step pads.; Easy No-Drilling DIY installation in minutes.; 5-Year warranty