For use on Ronal rims with a 76.0 mm center bore on cars with a 57.1 mm hub (Audi. Seat. Skoda. VW). Made of special nylon plastic. Impact, chemical and weather resistant. Before installing the matching ring, check that the center bore of the rim and the centering collar of the hub are free of rust and dirt. Clean the surfaces if necessary. Before installing the wheel with the matching ring under the car, make sure that you use the correct size matching ring and that it fits the rim and the car!