These circular reflectors have a hole in the centre for mounting with a screw and are suitable for trailers, caravans or other vehicles. Amber / Orange reflectors are used on the sides of vehicles and trailers. On long vehicles, the gap between side reflectors must be no greater than 3 metres. The reflector is E-Approved which means it is road legal and suitable for use across Europe. The reflector has an overall diameter of 84mm.