aluminum roof shutter weather protection corrosion resistance heat insulation CE marking Aluminum roof shutter *Slat option: 32mm, 40mm, 43mm, 55mm, 77mm, 98mm *Thickness option: 0.8mm, 1.0mm, 1.2mm, 1.5mm, 2.0mm for aluminum roof shutter *Function: Super defensive, noise protection; Fireproofing, hurricane proofing (can resist the wind with speed of 33.5 m/s); Energy conservation. Advantage* ...