straightener rolls,roll, roller, steel roll, casting iron roll, steel roll, casting steel roll, steel roller, tube mill roll roll, roller, steel roll, casting iron roll, steel roll, casting steel roll, steel roller, tube ... mill rollName: straightener rollsDiameter Range of roller: Φ230mm~Φ1500mmMaterial of roller: Acicular Bainite Nodular / Chill Casting Iron ...