Qingdao ZeRui Metal Co., Ltd. is one of the high tech manufacturers specializing in producing all kinds of air conditioning and refrigeration copper tubes, environmental friendly copper water tubes and copper fittings. Our main products are insulated copper tubes, copper pancake coils, LWC copper coils, copper water tubes, air conditioning straight tubes and prelagged copper tubes. Our annual production has got to 10000 metric tons. Our products are widely used in air conditioning and refrigeration, water and gas, heating, electrical and other fields. All our products are produced strictly as per ASTM standard, EN standard, JIS standard, AS standard and GBT standard.