THIS IS 1 OLDER JEWEL / REFLECTOR. THEY HAVE METAL BACKS WITH A STUD AND NUT BOLT, GREAT QUALITY AND ARE JUST ASTONISHING. THEY ARE ROUND DOME TOP, THEY LOOK GREAT ON THE BACK OF SCHWINN PRE WAR / PHANTOM BACK BICYCLE RACKS. THE METAL BACK CAPS FIT JUST RIGHT, GREAT TO ADD ON MUD FLAPS, HUB SHINERS OR SEATS. THEY ARE MADE OF GLASS NOT PLASTIC JUNK LIKE MANY SELL ON EBAY. THEY ARE 1 INCH WIDE AND LOOK JUST ASTONISHING, THEY LOOK GREAT AND HAVE SEEN THEM USED ON HARLEY DAVIDSON MOTOR CYCLE SEATS AND USED WITH J.C HIGGINS BICYCLE HORN TANKS. I DON'T HAVE MANY LEFT SO GET THEM WHILE THEY LAST.