1. Name of commodity: HT840/900 Double Layer Roll Forming Machine 1) Material of frame : 350mm H shape sheet 2) Thickness of middle plate : 14mm 3) Roller groups : 16 groups 4) Diameter of roller : 76mm 5) Roller material : 45# steel, thickness with chrome coated : 0.09mm 6) Shaft material : 45# steel after dealing with to enhance the intension of the roller. 7) Main motor power : 5.5Kw 8) Hydraulic station power : 4Kw 9) Hydraulic pressure : 10- 12 Mpa 10) Computer system PLC : Panasonic Frequency converter:7.5kw