As one of the few manufacturers to do so, NG Brake Disc provides all brake discs with a KBA release, so they can only be used on public roads without further notice. The general operating permit of the Federal Motor Transport Authority (KBA) is included with each disc. Like-for-like replacement of the OEM item. However, the design may differ on some models. Road approval of the Federal Motor Vehicle Department: yes outer diameter: 220mm inside diameter (recording): 110mm thickness: 4.0mm holes: 6 hole diameter: 6.5 mm Type: Standard