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SD4RHigh Air Pressure DTH Hammer for water well drilling blast hole drilling.
| SD4 Withfootvalve bit SD4 | Diameter(mm) | Flushing Hole | Gauge buttons | Front buttons | Weight(kg) |
| 105mm | 2 | 7*14 | 6*13 | 8kg | |
| 110mm | 2 | 8*14 | 7*13 | 8.5kg | |
| 115mm | 2 | 7*16 | 6*14 | 8.8kg | |
| 120mm | 2 | 8*14 | 7*13 | 9kg | |
| 127mm | 3 | 8*16 | 7*14 | 9.8kg |






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