Profession Measuring and Calibration system Feb. 25, 2011Jingstone Metrology Taiwan provides HI-ACCURACEY GRANITE MASTER GAUGE with DIN876/00 Super inspection grade. It features Germany craft technic precision hand lapping and High grade natual "Jinahchin" black granite, Quality calibrated 100% by JCC,conformed Germany TUV CERT DIN EN ISO9001 & ISO/IEC17025.... more