... SURFACE TREAMENT Chromate treament big,zero,mini,regular spangle. colour coating(soft,full hard) Chromate treament big zero,mimi, ... regular spangle. galvanized zinc coating (soft,full hard) Chromate treament big,zero,mini,regular ... spangle. galvalume Az coating (soft,full hard) APPLICATION SHUTTER ROLLER DOOR,BULIDING CONSRUCTION ...