Yakima Silver Raised Railing Mounted Roof Rack RailBars are available in a variety of precision fitting lengths. The Yakima RailBars are sleek, quiet, attractive, strong, custom fitting, aerodynamic, aluminum crossbars that look as good as they function. Yakima RailBars are aircraft wing shaped, aerodynamic crossbars that feature a push-down infilled t-slot for maximum noise reduction. Simply push down the rubber pad and fasten your accessory into the t-slot. Yakima RailBars are also compatible with most accessories designed to fit factory crossbars, including Yakima Roof Top Cargo Boxes. The Yakima RailBar, Raised Railing Roof Racks come fully assembled. The aerodynamics of the Yakima RailBar design reduces drag and noise to nearly zero. The result is a quiet, more fuel-efficient ride that lasts for years and exceeds even the most discerning standards. Yakima RailBars may locked to your vehicle with SKS Lock Cores (sold separately - see below.) Yakima RailBars are sold individually.