Material: granite
Specification: 160x25x16-630x100x63mm or customize
Hardness of the working surface: HS70
Surface treatment: ground finish
Precision grade: 00-0
Packaging: plywood box
Technical specification of granite parallel gauge:
| Specification(mm) | Flatness of working surface | Verticality between working surfaces | Verticality between side and working surface | |||
| Precision grade（um） | ||||||
| 00 | 0 | 00 | 0 | 00 | 0 | |
| 160×25×16 | 1.5 | 3 | 20 | 40 | 1.5 | 3 |
| 250×40×25 | 2 | 4 | 30 | 60 | 2 | 4 |
| 400×63×40 | 4 | 8 | 40 | 80 | 4 | 8 |
| 630×100×63 | 6 | 12 | 50 | 100 | 6 | 12 |
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