THIS IS 1 OLDER JEWEL / REFLECTOR, THEY HAVE METAL BACKS WITH A STUD AND WING NUT BOLT SO CAN BE USED ON FENDERS, HUB SHINERS OR SEATS. THEY ARE 1 INCH WIDE OR SO AND LOOK JUST ASTONISHING, THEY HAVE THE COOL DOME SHAPE, THEY LOOK FANTASTIC, LOOK GREAT AND HAVE SEEN THEM USED ON HARLEY DAVIDSON MOTOR CYCLE SEATS, AND USED WITH J.C HIGGINS BICYCLE HORN TANKS OR FIT JUST RIGHT TO THE BACK OF MANY SCHWINN BICYCLE RACKS.