HS Power 4" S/S Chrome Side Step NERF Bars Rail Running Board 99-15 F250/F350 SD Crew CAB Application: 1999-2015 Ford F250 / F350 / F450 / F550 Super Duty Crew Cab Models ( Fit Models With 4 Full Size Doors Only ) 4" Inch Side Step Nerf Bars Heavy Duty T-304 Full Stainless Steel With 5 years Warranty Against Rust And Corrosion, Oval Design Provides A More Secure Area color:Chrome 465 lbs. Weight rating. Bar is positioned high and tight for a better fit and cleaner look. Professional installation is recommended