Superficial Rockwell hardness block
(79-91)HR15N; (42-80)HR30N; (20-70)HR45N;
(88-93)HR15T; (70-82)HR30T; (55-72)HE45T
Rockwell Standardized Block,
Superficial Rockwell Standardized Block,
Brinell Standardized Block,
Hammer-hitting type Brinell Standardized Block,
Vicker’s Standardized Block,
Micro vicker’s Standardized Block,
Leeb Standardized block,
Leeb G type block