Granite Square Block (Riser Block) six sides finished flat grade 0 for machine calibration
| Order Code | H | W | L | V | Parallelism (Grade 0) | Perpendicular (Grade 0) | Flatness (Grade 0) | 
| 04GSB3030 | 300 | 300 | 300 | 30 | ±0.006 | ±0.006 | ±0.003 | 
| 04GSB4040 | 400 | 400 | 400 | 40 | ±0.008 | ±0.008 | ±0.004 | 
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Tax ID 0115546006764
969 Moo 5 Praksa Rd., Praksa Mai