... and elegant pattern. Surface treating is powder coating Roller shutters are designed with individual style,beautiful appearance and elegant ... , can saving 30% energy, obstructed 96% sunshine. Roller shutter Perfomance: 1)Roller Shutter Slat option: 32, 37, 40, 55mm; ... and colors are adjustable to users' requirements. ) 5) Roller Shutter Opening ways: Manual, electric and remote-controlled operation, ...