Specification and performance of Spiral Tube Former: 1.It can process a round duct with max. diameter 1.4m. Both of its intensity and airproffing are good. 2.All diameter rounds change drastically. 3. With constant high-speed cutting equipment, so the strip speed is fast , the capability is stable. 4.Now all the round duct machines are manufactured in term of European standards. The qualities of machines have reached European standard. Technical Data: tube diameter(mm): 80-1400 maximum tube length(mm): 3000 thickness (mm): 0.5-1.0 strip width (mm):137 strip speed (m/min): 4-40