THIS IS A NEVER USED ALL CHROME HORN TANK USED ON OLDER VINTAGE 1941 COLUMBIA BIKES AND OTHERS,,,,SEE PHOTO OF BOTH SIDES,,,ITS JUST ASTONISHING,,,,,,ITS 12 INCHES LONG OR SO AND CAN BE USED ON SOME OTHER BIKES OR CUSTOM MADE BIKES,,,RAT RODS AND OTHERS,,,THIS TANK CAN TAKE A HORN UNIT / BUTTON AND I HAVE THAT IF NEEDED,,IF YOU WONT THE HORN TO WORK,,,,,.YOU CANT RECHROME YOUR OLD TANK FOR THIS GREAT PRICE.