Westin R7 Step Nerf Bars Black Aluminum For Super Cab Model 28 71085 Duramag which bridge the gap between 6.7 which bridge the gap between Wall Liners and the Ceiling to complete the look and hide wires and van cavity of your Mercedes Sprinter 170" Wheelbase reduces wear avoiding dry prime conditions R7 Boards are sold in complete kits that include: Driver and passenger side boards vehicle specific mount kit and come with injection molded bracket covers for an extra clean look R7 Boards are available in polished stainless steel backed by a lifetime warranty and black powder coated aluminum backed by a 3 year warranty