... of IC, thin plastics, metals thin slice . HBRVU-187.5 Brinell, Rockwell & Vickers Optical Hardness Tester with numerous testing forces ... , surface heat treatment and chemical heat treatment. Specifications ModelsHBRVU-187.5 Rockwell ScalesTesting ForceHRA, HRB, HRC, HRF,HRG60Kg (588N),100Kg ... .7N),150Kg(1471N)Vickers ScalesTesting ForceHBW2.5/31.25,HBW2.5/62.5,HBW5/62.5, HBW2.5/187.5306.5N(31.25Kg),612 ...