Triple scale barometers feature readings in cmHg, inHg and mbar. Includes single scale thermometer and 0/100% humidity reading. Accuracy is 3.5mbar; 0.1inHg; 0.3cmHg; 2% of scale (temperature); 5% RH. Made of stainless steel and brass, they are recalibrateable. Measure 152mm (6”) in diameter. Compl..