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 ... Rolling Diameter (mm): 800, 720, 630, 600, 520, 430. Four-High Rolling Mill