Mitutoyo 178-607 Precision Roughness Reference Specimen, Ra 0.4 / 3µm, Inch/mm

The Mitutoyo 178-607 is a Mitutoyo precision roughness reference specimen with two areas, one for checking the stylus and one for calibration, for checking and calibrating surface roughness testers such as the Surftest SJ series. The calibrated values are marked on each specimen.

• Stylus check area: Ra approx. 0.4 µm, Ry approx. 1.5 µm
• Calibration area: Ra approx. 3 µm, Ry approx. 11.5 µm
• Units: marked in inch and mm

Made in Japan by Mitutoyo.