Japanese YAMAMOTO hardness test piece
Yamamoto YAMAMOTO Japan-made hardness standard block (with original factory calibration report)
Glass correction film
單軸刻度玻璃校正片 最小切分:一格0.01mm(10um)
Japan ASAHI hardness test piece
Japan ASAHI hardness test standard sheet (with original factory calibration report)
EURO hardness test piece
British EURO hardness standard test piece (with European UKAS certification calibration report)