This type of roof bar for longitudinal bars is made of aluminum, very easy to use, and allows you to safely transport your bike rack, roof box, or any other carrying equipment. Lighter in weight, aluminum roof bars reduce wind noise, their low weight makes installation easier while maintaining durability. Just like steel roof bars, the mounting systems are designed to attach directly to any roof equipped with longitudinal bars. You simply need to fix them onto the longitudinal bars of your car.