... quarry, ore, tunnel. Detailed Product Description of Drill RodNameQualityLengthGOrdinary Grade0.5 m, 0.8 m, 1 m to 6 m.G1High ... Quality Grade0.5 m, 0.8 m, 1 m to 6 m. ... G11Export High Quality Grade0.5 m, 0.8 m, 1 m to 6 m. ... G111The Best Quality Export Grade0.5 m, 0.8 m, 1 m to 6 m. ... 40 mm2, Size: B22 (mm)3, Drill pipe length: 0.5 m, 0.8 m, 1 m to 6 m.We ...