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The rod is designed for drilling wells with diameters: 65-250 mm. Made of ST40 metal, welded wall thickness 3.5 mm, thread Z50, conical, length 2 m. Available: Rod 2m thread Z-50 (conical); Rod 2m thread (strip); Rod 1.5m thread Z-50 (conical); Rod 1.5m thread (strip)