MaxMate Custom Fit 1999-2018 CHEVY SILVERADO/GMC SIERRA 1500/2500LD, 01-19 CHEVY SILVERADO/GMC SIERRA 2500/3500HD Extended/Double Cab Stainless Steel 3" Side Step Rails Nerf Bars Running Boards 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 stainless steel 3 inch round tubing ! UV resistant non-slip wide step pads.; Easy No-Drilling DIY installation in minutes.