... 2.Size:Different size available 3.Back:Steel mes Decorative External Aluminium Shutter Window Specifications: 1.Material:Alumiumn Alloy Extrusion2.Size ... , fire-proof, corrosion-proof, shock-proof Application: Building external wall, Sport center, Pillar, Terrace, Airport, Bus station, etc. Decorative External Aluminium Shutter window