The weems & plath atlantis barometer black dial measures 4" dial x 5.5" base x 2.75" depth. The front-opening screw bezel case is constructed of solid, forged brass with a coat of lacquer to ensure a lasting shine. This barometer is calibrated for altitudes to 3,500' above sea level. It features fully adjustable, temperature compensated aneroid movement with inch and millibar scales. Several wood bases are available for this barometer. It comes with complete instructions and mounting hardware. This item carries a limited lifetime warranty.