Mitutoyo 500 196 20 digimatic caliper 150mm 6in mitutoyo 500 196 30 the mitutoyo 500 196 30 absolute aos is a digital caliper equipped with standard outside and inside jaws hardened stainless steel construction and equipped with the latest electromagnetic absolute aos system scale for error free high speed measurement p p p it has a large and clear lcd readout and a zero abs button that allows the display to be zero set at any slider position along the scale for comparison measurements