3" Side Step Rails Nerf Bars Running Boards Compatible 1999-2016 Ford F250 F350 F450 F550 SuperDuty Super Cab/Extend Cab (2pcs Mounting Bracket Kit) Application: 1999-2016 Ford F250 F350 F450 F550HD Superduty Super Cab/Extend Cab (Note: Not for Crew Cab) Stainless steel running board for both driver & passenger side boards, all mounting hardware and DIY Instruction included Made of marine grade heavy duty stainless steel with polished chrome, allows to withstand the wear and tear that comes with regular exposure to road debris, providing a long-lasting performance Recessed side step pads for better slip resistance, providing traction for safe footing Direct bolt-on, hassle-free installation for Ford nerf bar