... for plastic sheet extrusion machine Mirror polish calender roll, mirror polishing calender roller, mirror calendering roll for plastic sheet ... are most professional roll maker! Main products:Calendering roll: mirror roll, embossed roll, chamotte sand roll, matte roll ... 12mmTIR on Straightness and concentricity: ≤0,01mm;Surface finish: mirror polishing; (also available: sand finish, spray finish, ...