Weighing 139.68 ounces and measuring 5.7" by 3.07", this roof bar for cars is made from strong and tarnish-resistant anodised aluminium, which gives it a non-slip surface. It can be affixed to over 70 different brands of vehicles (includng Audi and BMW) using the robust screws provided, and it provides you with the ability to store luggage, boating gear, and more on your car roof.