Weems & Plath's largest clock and barometer: Dial a full 6 inches, Base 7 1/2 inches diameter, Case depth 2 5/8 inches. 4 lbs. 5 ozs. Easily read from across the room. Captains has tested this barometer and finds it to have a sensitive, accurate, well temperature compensated, German made movement. Includes both inch and millibar scales. Adjustible and calibrated for altitudes up to 3500 feet above sea level. For Higher altitudes contact Captain's for a special order movement up to 7,000 feet. Solid brass cast case with screw-on bezel. Lifetime warranty, mounting hardware and instructions included.