... ,15.88MM 4.condenser ,evaporator coilSpecifications:O.D.Copper Tube Thickness of copper pipe Hole Space Row Space 15.88mm ... me. Sally Qin Raw material Copper tube (inner smooth or inner grooved): O.D. Φ 7, Φ 7.94, Φ 9.52, Wall thickness: ... , Center air-conditioner for householdKey processTube bending, Punching the fins, Tube expanding, Degreasing, Welding and assembling, Leakage test, Drying, (Bending), ...