Roundness Tester R250 roundness tester was conceived from the need to characterize pieces with circular and even complex geometries with utmost accuracy, and it is the ideal instrument to satisfy multiple measurement needs in the mechanical, motor, aerospace and machine manufacturing industries. Thanks to its solid structure consisting of a base made in diabase and pneumostatically supported plate, it can accurately measure pieces of also considerable weight. The device is matched to Circom software that was conceived to be extremely user-friendly and easy to use, thus allowing to train an operator within a short period of time, reducing training and testing costs.