... ,RoHS Color: white, cream Material: aluminum alloy Automatic Rolling shutter window Components keep color period 15 years Main color ... crank, Length: 0.5m——2mSurface treaded: powder-coating Rolling shutter Function Anti-sunlight, anti-rust, anti-lacerated , anti ... warm-keeping .Save energy design, when the roller shutter closed, can saving 30% energy, obstructed 100% sunshine. Automatic Roller Shutter