The PROLINE Internal Pneumatic Line Up Clamp is suitable for use in welding a wide range of pipe diameters from 16″ – 60″ (406.4 mm – 1524 mm) steel pipe and feature a powered forward and reverse. Features: Forward / reverse travel motor. Air reservoir tank. Two double acting air cylinders to propel clamp a double joint distance. Independent front and rear line up heads. 40 feet of reach rod and control ends. Operation and maintenance manuals. Options: PROLINE Conversion kit available to quickly adjust clamp for different size pipe.