Connecting pipe for air conditioner.
From 7000btu to 60000btu.
1) 1/4", 3/8", 1/2", 5/8", 3/4" available
2) Good temperature-preserving, much better then copper tube, saves energy and  Electricity
3) Low price and resource-saving
4) Learned from overseas advanced welding experience, clean, no solder, conformTo the requirements of refrigeration tubing (have been running inRefrigerator for many years.
5) Passed the strict examination by CONNECTING TECHNIC CENTER of HARBIN INSTITUTE OF TECHNOLOGY and some top grade air-conditioner manufacturers
Its performance of airproof, pressure-assistant, flexibility, anti-corrosion, mechanics, and cleanness can meet the requirements of national standard, having the same feature and life like copper tubing working as the connection part, but decreasing the cost by 20-50%.