- DIN875 grade 0
- Made of hardened stainless steel
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| Squareness | |||||||
| Code | Size (LxW) | Inside(α) | Outside(β) | C | D | H | E(mm) |
| 4793-50 | 50x40mm | 6µm | 6µm | 13 | 13 | 4 | 13 |
| 4793-75 | 75x50mm | 6µm | 7µm | 15 | 15 | 4 | 15 |
| 4793-100 | 100x70mm | 7µm | 7µm | 20 | 20 | 5 | 20 |
| 4793-150 | 150x100mm | 7µm | 8µm | 30 | 30 | 6 | 30 |
| 4793-200 | 200x130mm | 8µm | 9µm | 30 | 30 | 7 | 30 |
| 4793-250 | 250x165mm | 9µm | 10µm | 35 | 35 | 7 | 35 |
| 4793-300 | 300x200mm | 10µm | 11µm | 40 | 40 | 8 | 40 |
