Complete made of brass. The Metric and English system scales read from 25" to 32" and 54 cm to 81 cms. respectively with reflector behinds scales and cistern. The vernier is worked by a milled head at the side operating with rack and pinion &reads .01" and .01 cm. respectively. Thumb screw at the base works very smoothly and there is no surging of mercury. The barometer tube and scales covering glass are made from corning glass. Mounted on wooden board fitted with metal thermo meter w/o mercury.