Solid brass protected with a clear laquered finish. Base measures 5 3/8" and the top measures 4.5". Height of instrument is 2.25". Mounted weight: 8.5 oz. The Euro Thermometer keeps accurate temperature to within +/- 2c. It is a reliable instrument that no nautical mariner should be without. It comes complete with mounting hardware. An excellent choice for boat cabins. Also available in a mounted weather station.