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The black marble surface plate is made of granite material that is machined and ground by hand. It has a precise structure, uniform texture, high stability, with the addition of higher precision grades in order to satisfy all specific user needs, both in workshop or in metrological room.
| Specification | Precision Grade (um) | Net weight (kg) | |||
| Grade 000 | Grade 00 | Grade 0 | Grade 1 | ||
| 300*200*50mm | 0.9 | 1.8 | 3.6 | 7 | 9 |
| 300*300*70mm | 1 | 1.9 | 3.8 | 7.5 | 19 |
| 400*250*70mm | 1 | 2 | 4 | 8 | 21 |
| 400*400*70mm | 1.2 | 2.3 | 4.5 | 9 | 34 |
| 630*400*100mm | 1.3 | 2.5 | 5 | 10 | 77 |
| 630*630*100mm | 1.3 | 2.5 | 5 | 10 | 121 |
| 800*500*100mm | 1.4 | 2.7 | 5.3 | 11.5 | 215 |
| 1600*1000*200mm | 2 | 4 | 8 | 6 | 982 |
| 2000*1000*200mm | 2.4 | 4.8 | 9.5 | 19 | 1228 |
| 4000*2500*500mm | 4.4 | 8.8 | 17.5 | 35 | 15350 |






