These 60mm circular reflectors are pre-fitted with a threaded bolt which is mounted to the rear and allow the reflectors to be securely fitted to boards or bodywork. Each threaded bolt includes a nut and washer. The length of the threaded bolt is approximately 23mm. Red reflectors are used to mark the rear side of a vehicle or trailer. It is an MOT requirement to have red reflectors on the rear of the vehicle and it is an important safety feature. The reflector is E-Approved which means it is road legal and suitable for use across Europe. They are suitable as trailer reflectors, caravan reflectors, gatepost reflectors and many other uses.