2004-2008 Ford F150 F-150 Super Crew Blade Series Step Bar Running Boards Provide great styling and functions for easy entry / exit of the vehicle. Never Rust! Aircraft alloy will never rust because it is a stainless alloy. Top quality polished 6061 aircraft alloy measures 2" high & 4 1/2" wide. Complete with mounting kits and instructions. High strength/Light weight and save gas!