Automatic Roller shutters CE,TUV,RoHS,CB MAX SIZE 22sq.m(window) Keep color ... coating surface treaded The Largest Professional Roller shutter Factory !Shinilion Automatic Roller shutters IntroductionMaterial is Using 97% purity aluminum ingot 6063T5 ... % energy, obstructed 100% sunshine. ProductionStandard The Highest standard in China Automatic Roller shutters