... colors sound &heat proof, burgary proof motorized roller shutter , rolling blinds Aluminum roller shutter door Material is Using 97% purity aluminum ... stain in vision will be off. Pure manual only for roller shutter window Manual crank, Length: 0.6m, 0. ... radiation-proof , noise-proof , warm-keeping .Save energy, when the roller shutter closed, can saving 30% energy, obstructed 100% sunshine. motorized ...