... different colors sound &heat proof, burgary proof Aluminum roller shutter door Aluminum roller shutter door Material is Using 97% purity aluminum ingot 6063T5; ... stain in vision will be off. Pure manual only for roller shutter window Manual crank, Length: 0.6m, 0. ... -proof , noise-proof , warm-keeping .Save energy, when the roller shutter closed, can saving 30% energy, obstructed 100% sunshine. Aluminum ...