Yescom 1/4" to 7/8" (6-22mm) O.D.Tubing Aluminium Alloy Copper Pipe Tube Bender with Bending Function Case Trouble free ratchet mechanism 7 exchangeable tube bender heads For Inch: 1/4", 5/16", 3/8", 1/2", 5/8", 3/4" and 7/8" O. D. Tubing Hard copper must be annealed before bending. Use for annealing, HB 35-45 MPa or pressure systems copper pipe