Light, strong, and durable, the Chrome Endurance II 105 Open Dial Barometer features a holosteric or aneroid movement which measures atmospheric pressure mechanically without the use of liquids. The movement in this compact barometer is temperature compensated and fully adjustable with inch and millibar scales, and is calibrated for altitudes up to 3,500 feet above sea level. This chrome porthole style barometer is weather resistant and guaranteed to never tarnish.