APS 4" Black iBoard Running Boards Fit 99-13 Chevy Silverado/GMC Sierra Double Cab EASY TO INSTALL - iBoard package includes set of 2 black running boards, mounting brackets & hardware for an easy bolt-on installation Massive 4 Inch Wide Solid One Piece Bars, Provides a Wider step area for Secure Footing. Polished 6061 Aircraft Aluminum Boards with Matte Black Power Coating, Best Rusting and Corrosion Resistance Compare to Other Brand Steel Bars on the Market. iBoard Surface Covered with Full Length, Premium Quality UV Resistant Non-Slip Rubber. Body Frame Mount (No Drilling Required), Fit: 1999-2013 Chevy Silverado / GMC Sierra 1500/2500 Double Cab & 2001-2014 2500HD/3500 (Excl. C/K Classic)