1.Certification: CE, TUV, RoHS, CB. 2.Resist bad temperature, Fireproofing, Super defensive, Product description(1) It is the replacement of the traditional roller shutter doors; the shutter piece is double-slats aluminum alloy and the appearance is finished with advanced powder coating process.(2) The door piece height is 32mm.It has highly intensive protection ability, maximum widthcan be 3m. ...