Diameter of warm-up roller:￠600mm、￠800mm、￠900mm、￠1100mm available discretionarily. Each surface of roller are treated with exactitude milling and plating rigid chrome,glabrous and durable. Each layer warming-up range can be electromotion adjusted in monolayer. Can be collocated in monolayer or multriple. Expiry width:1400mm-2200mm