Reducing noise and lowering drag, The New Thule AeroBlade Load Bars work with the rest of your Thule system to haul your gear safely, securely and quietly to your destination. Aluminum bars feature a textured cover that diffuses airflow better than a smooth surface, greatly reducing wind noise. The bars also feature SwingBlade end caps that pivot open allowing full access to the T-slot for easy accessory installation.The SmartSlide system is a tape-measure-free, hassle-free molded measurement system on the underbar for easy foot installation and using a vertical load test, the AeroBlade bars can sustain over 800 lbs of force. The AeroBlade Bars work with all of the Thule Rapid Foot Packs and are just 1 component of a Thule car top rack system. Textured cover that diffuses airflow better, SwingBlade end caps that pivot open allowing full access to the T-slot for easy accessory installation, Hassle-free molded measurement system on the underbar for easy foot installation, Bars can sustain over 800 lbs. of force, GTIN: 0091021314078, Model Number: ARB43, Shipping Restriction: This item is not available for shipment outside of the United States., Product ID: 254548, Model Year: 2019, Bar/Clamp: Load Bar, Mount Type: Roof