These were used by Sinclair Oil to place on buildings off site. They are new old stock and never used. You will receive one identical to the picture but a different number. THEY ARE MADE OF ALUMINUM AND MEASURE 2 1/4 INCHES BY 4 1/2 INCHES. Please see Pictures. Thanks for looking and while you are here why not take a look through my store. I have many unique and very hard to find items.