... Copper tube:OD:1/4,&3/8,&1/2,&5/8,&3/4,(2)Packaging can be determined ... ,4,6,7,10,15,20M(4)Color: white(5)port: shanghai(6)payment terms: T/T (7)Length ... reducing the cold waste, improve the energy efficiency level.5, safety performance: copper-aluminum connecting pipe bursting pressure and ... copper-aluminum connecting pipe copper tube design is 1.5 times the wall thickness, not only to ensure strength ...