steel rail 1 Length: 5-12.5m 2 Bottom Width: 63.5-150mm 3 Head Width: 32.1-75m ... Material: Q235,50Q,50Mn,55Q,U71Mn,U75V steel rail 1 Length: 5-12.5m2 Bottom Width: 63.5-150mm3 Head Width: 32 ... .1-75m4 Material: Q235,50Q,50Mn,55Q,U71Mn,U75Vsteel rail application : steel rail Product ...