Thule KIT186028 Evo Flush Rail Mounting Kit is designed for the perfect fit to a particular car model, which results in maximum safety and ease-of-use. An integrated roof rail is a roof rail that sits flat on the car roof and under which you cannot see. The advantage of this solution is that the foot sets and the load carrier bar sets are mostly universal, so you can also install them on a new or different vehicle. This means that when you change vehicles, you only need a new assembly kit, which is the cheapest component. This makes the solution with the Thule mounting kit cost-effective and you don't have to be a car mechanic, to properly install this product. Thanks to the good fit, the logically structured operating instructions and the simple handling, anyone can actually attach this assembly kit to their own vehicle. The mounting kits are vehicle specific and have been developed and tested at the Thule Test Center to guarantee a perfect fit. This product consists of rubber caps that grip around the roof rack with metal plates. After they are screwed down, your roof rack is perfectly anchored to the roof rails and is absolutely secure. So you can go on your journey with peace of mind. Comes in 4 pieces pack. Fitting kit for the following vehicle(s): Volvo XC60, SUV with flush rails - 2017 onwards, Volvo XC90, SUV with flush rails - 2015 onwards.