... ×20801.Consist of XK-400/450/560/660 Open Mixing Mills :Base, frame, the rollers, roller bearing , roll gap ... .Features of XK-400/450/560/660 Open Mixing Mills Materials of Rolls Cast iron alloy (LTG-H), ... -six1.Consist of XK-400/450/560/660 Open Mixing Mills :Base, frame, the rollers, roller bearing , roll ... .Features of XK-400/450/560/660 Open Mixing Mills Materials of Rolls Cast iron alloy (LTG-H), ...