Description
Sonatest CBM Step Block. Metric Series of steel discs set into a perspex block for calibration and linearity checking of thickness meters and flaw detectors. Includes 6 x 25mm diameter discs with thicknesses of 1.5, 2.5, 5.0, 10.0, and 20.0 mm. Comes with certificate of conformity. Sonatest product number 149097