The Genuine Volvo Seat Belt Height Adjuster - 39854720 is a safety feature designed to ensure proper positioning of the seat belt for the driver and passengers. It allows for the adjustment of the height of the seat belt, providing a comfortable and secure fit for individuals of different heights. This product is specifically designed for Volvo vehicles and is made with high-quality materials to ensure durability and reliability. It is an essential component for maintaining safety while driving and is easy to install.