... Air-Conditioner, Refrigeration, Natural Gas, Water, Heat-Exchangers,General Plumbing. 1. Copper Tubing For Air-Conditioner, Refrigeration, Natural Gas, Water, Heat ... Coil,Copper LWC Coil, Copper Straight Pipe.3. Outside Diameter: 1/4"-6 1/8"4. Length: 5.8m,6m.5. Temper: Hard ...