Connection tubing for air-conditioner is the connection tubing system between indoor and outdoor frame of air-conditioner. At present, most domestic companies usecopper tubing. Taking foreign welding technology for reference, We develop a type of copper & Aluminium connection tubing that can be applied to air-conditionerand refrigerator etc.. Its welding method completely conform to the special requirements for refrigeration tubing system, have passed the strict examinationby the Ha Gong Da Modern Connection Technology Center etc.. The product has gotgood appraising from customers.Its performance of airproof, pressure-assistant, flexibility, anti-corrosion, mechanics, and cleanness can meet the requirements of national standard, having thesame feature and life like copper tubing working as the connection part, but decreasing the cost by 30-50%. Property: 1. Don't need welding-assistant flux, meet the requirements of cleanness for refrigeration tubing;2. The length of welding fusion is more then 6 mm, ensuring no leakage for the welding connections, avoiding the break of the connection under high pressure.3. Avoid corrosion by refrigeration flux.4. Use KTG heat shrinkable tube as the whole protection, surely insulating water and moisture, no corrosion, has decreased the temperature dissipation, increased the effect of temperature remaining. 5. Use high quality Aluminium tubing with its thickness more then 1mm, with good bending and anti-pressure, easy to install and move.6. Easy to be welded like copper tubing. Condition: Can work on the same air-conditioner condition like copper tubing. Feature ROHS compliant Standard: Conform to national standard.