This Altitude boat barometer is known as the 125mm barometer featuring a white dial face with clearly readable measurements and descriptions and comes complete with a mobile index pointer to help with reading the change in atmospheric pressure.
Easy to install with three holes evenly spaced around the base and screws that are provided. The casing is brass with a plastic clear lens.
|Fixing Hole Centres||76mm|
Calibration in your location is necessary to get an accurate reading.