Green Mini Reflector Plate Bolt Fastener For License Plate Motorcycle 4 Piece for Ducati Multistrada 1000 This is for a 4-pack of mini reflectors Designed Especially for Motorcycle/Bikes Can be used for any license plate, where being seen is vital Can also be utilized for Boats/Tractors/Trailers/ Bikes etc. This item is 24.5mm in diameter