1 Raw materials: Copper pipe for R410A with high density& pressure and advanced workmanship; 2 with special designed soldering material & Aided welding for inner space, which have guaranteed disperse pipe with durability and no leakage; 3 Shape dimension has optimized from old ones: total length has been shortened, while thickness inreased, especially for TEE parts which has assured the influency of refrigerant; Besides, the improvement of pipe has greatly inreased cost performance; 4 Scrupulous quality control, inspection of raw material,Surface treatment is among No. 1s in domestic.