... Aluminum roller shutter door Aluminum roller shutter door Material is Using 97% purity aluminum ingot 6063T5; Surface treated power coating; Components keep ... in vision will be off. Pure manual only for roller shutter window Manual crank, Length: 0.6m, 0.8m, ... proof , noise-proof , warm-keeping .Save energy, when the roller shutter closed, can saving 30% energy, obstructed 100% sunshine. Aluminum ...