rolling shutter,aluminium,42mm,55mm,77mm slats,insulated! rolling shutter door panel:high quality rolling shutter door panel .weidth: 77mm, 65mm,55mm,42mmraw material: color steel and polyurethanematerial: color steel with PU foam inside.operated by automatic tubular motor with remote controllers.web: www.chinesedoors.com www.wxjieyang.com