76mm ST58 High Durability Rock Drill Pipe For Hydraulic Rock Drills Our 76mm ST58 drill tube is a premium top hammer drilling tool engineered for modern hydraulic rock drills. Available in standard and custom specifications, this high performance pipe delivers exceptional durability and efficiency in demanding drilling operations. Product Specifications Outer Diameter : 76mm (3") Standard Lengths: 1525mm (5ft) - 33.2kg | 1830mm (6ft) - 41kg Thread Type: Male Female (MF)