... , for plastic sheet extrusion production line roll sleeve, roller sleeve, for plastic sheet calendering roll, for plastic ... coating roll: net embossed calendering roll, steel alloy calendering roll, stainless steel calendering roll... Specification and parameter: Roll ... pipe, integrated forging 45# steel; 20# steel; 42CrMoA steel aloy, etc. Roll shaft material: 45 steel, integrate forging; Cooling water ...