| Surface Rockwell Hardness Standard Blocks | |
| Type | Dimensions |
| 88-92HR15N (Mirror surface) | Ring |
| 74-82HR30N (Mirror surface) | Ф60mm×Ф10mm×10mm |
| 45-55HR30N (Mirror surface) | 0.2 kg Each |
| 45-55HR45N (Mirror surface) | Mirror surface |
| 85-91HR15T (Mirror surface) | |
| 70-80HR30T (Mirror surface) | |
| 54-72HR45T (Mirror surface) | |