China Air Conditioner Bronze Heating Pure Copper Tube 99.9% Copper Tubing for Refrigerant Services. High Purity Copper: Material contains 99.95% minimum copper content for superior conductivity. Multiple Hardness Options: Available in 1/16, 1/8, 3/8, 1/4, 1/2 hard, and full hard temper states. Comprehensive Certifications: Certified with ISO9001, ISO14001, ISO45001, and RoHS standards. Wide Application Range: Suitable for HVAC, refrigeration, fire sprinkler, medical gas, and plumbing systems. Factory Direct Pricing: Competitive pricing directly from the manufacturing facility. Strict Quality Control: All products undergo strict quality inspection before packaging and shipment. Flexible Payment Terms: Accepts T/T, 100% L/C at sight, Cash, and Western Union.