APS iBoard Running Board Black 4" Fit Silverado/Sierra Double Cab 07-17 Innovative Patented iBoard Design Inspired by iPhone Style, Deliver an Unique, Outstanding, Functional Appearance to your Vehicle. 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. Includes Both Passenger and Driver Side Boards, All Mounting Hardware and DIY Instruction.