1.Four-high rolling mill 2.long life 3.the best price 4.high quality Specification Type: 820, 750, 650, 600, 520, 450 Max Rolling Power (kN): 6000, 6000, 5000, 3000, 3000, 2500Max Operation Open Angle (mm): 40, 40, 20, 20, 20, 20 Operation Roll Max. Rolling Diameter (mm): 480/380/360, 380, 360, 320, 320, 320 Min. Rolling Diameter (mm): 460/360/320, 360, 340, 290, 290, 290 Rolling Diameter (mm): ...