... ";4.5" 3)paint,stain color 1) Material: high quality aluminum 2) Specification:A) Louver/blade:63.5mm/88.9mm/114 ... .3mmB) Customerized sizes available for our window shutter 3)Structure:Laminated stile , anti-deformation,4) Finishing: Quality prime ... , bi-folding opening optional 10) shutter tansportation:By air or by seaIf you are looking for quality Aluminum shutter,please come to ANYHOO