Bright and smooth on both sides; Clean and straight; Precise size; High quanlity 1. Type of alloy: Alloy CuZn20Al2, C68700, belongs to condensing tube series2. Size range: Outside diameter: 6-40mm, wall thickness:0.5~3mm, Length ≤12metres 3. Manufacture in accordance with GB, ASTMB, BS, EN, JIS standard4. Applications: heat exchanger and condenser etc. Hot sale 2012 Aluminum brass tube C68700