Topline Autopart 3" Chrome Side Step Nerf Bars Rail Boards Jl 99-16 F250/F350 Super Duty Ext Cab Application: 1999-2016 Ford F250 / F350 / F450 / F550 Superduty Super ( Extended ) Cab Models ( Attention Note: Will Fit Models With 2 Full Size Front Doors & Half Size Backward Doors ; Will Not Fit Crew Cab Models With 4 Full Size Doors That Open In The Same Fashion ) 3" Side Step Nerf Bars Classic Style Design Tube, Rugged Frame & Mount Design Tube For Strength & Durability Heavy Duty Polished Stainless Steel, Stainless Steel Tubes Maximizes Rust Protection Color: Polished Stainless Steel