Standard: DIN 861 - Made from very though Zirconia Ceramic with high precision - Service life is up to 10 times that of steel - Hardened to HV1350 - Thermal expension 11.5 x 10-6/k - No requirements for anti corrosion treatment - No effects resulting from hand contact - Antimagnetic, anti-static, and non-conductive properties - Excellent wringability due to microlite material - Every gauge block its own serial number - Available in 3 grades: - Grade 0 for calibration - Grade 1 for inspection - Grade 2 for workshop - All sets have a MOORE & WRIGHT certificate - All sets can be issued with a UKAS certificate at extra cost