... )" REG152-20313ZRC180G181815452051.0-2.520 (at 1.7Mpa)15-34API(4 1/2)" REG195-254 With yeas of experience, now Zhongrui ... supply 90mm-254mm(3.5"-10") DTH hammer, 340,350,360,380, COP44, COP54, COP64, COP84 , 3"-8" DTH hammer, ingersoll ... rand dth hammer , 340,350,360,380 4",5",6",8" quick hammer with very good price and ...