straightener rolls,roll, roller, steel roll, casting iron roll, steel roll, casting steel roll, steel ... , 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, Hi-Ni, ...