Our Circular Taxi Horn is crafted of solid brass with a removable rubber bulb and a metal reed. It has a GREAT honk.
The approximate overall dimensions are 14" in length with a 2 3/4" bell.
If replacement is necessary, this horn uses a bulb with a 5/8 inch fitting.
You should expect your brass instruments to have, or develop, an attractive antique patina. However, if you prefer the high shine look we recommend Brasso (TM) as a good polish.