1. flexible design, no lead welding flange. 2. Widely used in domestic & auto air conditioner. 1. Aluminum pipes manufacture 2. Mainly to assemble the bending aluminum pipes and accessories. 3. Rivet joint form, promote the product permanence, flexible design, no lead welding flange. 4. Widely used in domestic & auto air conditioner. 5. Major customer: Valeo Japan, from 2008.