... sound &heat proof, burgary proof Aluminum roller shutter door Aluminum roller shutter door Material is Using 97% purity aluminum ingot ... -120 Slat, Max Making Size:60m2,for garage door, hurricane shutter , industrial door, factory gate Main color : White, cream, ... , warm-keeping .Save energy, when the roller shutter closed, can saving 30% energy, obstructed 100% sunshine. Aluminum roller shutter door