Light, strong, and durable, the Endurance II 115 Chrome Open Dial Barometer is a holosteric, or aneroid type which measures atmospheric pressure mechanically without the use of liquids. The movement in this midsize barometer is temperature compensated, fully adjustable with inch and millibar scales, and is calibrated for altitudes to 3, 500 feet above sea level. This porthole style instrument is weather resistant and guaranteed to never tarnish. Features: Midsize dialTemperature-compensated, fully adjustable aneroid movementCalibrated for altitudes to 3, 500' above sea levelMaintenance-free, ultra-hard finishWeather-resistantTraditional porthole front opening bezelBeveled glass crystalMounting methods for boat or shoreInstructions & mounting hardware includedLifetime warranty Traditional porthole front opening bezel Mounting methods for boat or shore Instructions & mounting hardware included | Weems & Plath Chrome Endurance II 115 Open Dial Barometer