... create perfectly expanded tubing for soldering or brazing,you must use soft copper or fully anneal end of tube to be ... /Expanding Kit (CT-300A+CT-107+CT-209)1. manual hydraulic mechanism designed can expand from 10mm to 42mm O.D ... :10,12,16,19,22,25,28mm O.D. Tubing. Hydraulic Tube Expander- CT-300A