... usage: rolling copper, aluminum etc. alloy plates Structural features: this machine is 2hi closed irreversible mill,, including the mill body, herring ... hand screw down, you can choose any of them. The machine including: main motor, screw down motor, reducer, herring bone gearbox ... 280~ 320 mm long 900 mm material: roll steel roller 2.Second and third roller machine diameter: 280 ~ 320 mm long 750 ...