MaxMate Premium Custom Fit 99-Up Silverado/Sierra Extended/Ext Cab Stainless Steel 4" Straight Side Step Rails Nerf Bars Running Boards(2pcs with Mounting Bracket Kit) IMPORTANT: Only fit Extended Cab with 2 full-size front doors & 2 suicided rear doors NOT for Crew Cab with 4 full-size 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 Marine-Grade stainless steel 4 inch oval tubing rust resistant! UV resistant non-slip wide step pads.; Easy No-Drilling DIY installation in minutes.; Lifetime warranty