Standard Blocks for Hardness(YAMAMOTO)

Standard Blocks for Hardness HMV JIS B 7735
UMV JIS B 7735
HN-W JIS B 7735
HV JIS B 7735
HS JIS B 7731
HL JIS B 7731
HR C JIS B 7730
HR A
HR30N
HR15N
HR45N
HRB W JIS B 7730
HR30T
HR15T
HREW JIS K 7202
HRMW
HRLW
HRRW
HRFW
HRSW
HBW JIS B 7736