... thin plastics, metals thin slice . HBRVU-187.5 Brinell, Rockwell & Vickers Optical Hardness Tester with ... treatment and chemical heat treatment. Specifications ModelsHBRVU-187.5 Rockwell ScalesTesting ForceHRA, HRB, HRC, HRF,HRG60Kg ... 1471N)Vickers ScalesTesting ForceHBW2.5/31.25,HBW2.5/62.5,HBW5/62.5, HBW2.5/187.5306.5N(31 ... HRA,(30~100)HRB,(20~67) HRC(8-650) HB (14-1000) HVExecuted StandardGB/T230.2 ...