sound proof glass window pvc hurricane plantation shutters shuttered windows on China WDMASound proof glass window pvc hurricane plantation shutters shuttered windows Products Description Product Paramenters Materials basswood, Paulownia wood,PVC material Louver Blades Size 2 1 2" (63. 5mm), 3 1 2" (88. 9mm), 4 1 2" (114. 3mm) Tolerance Width: + 0. 6mm, Thickness: + 0. 3mm Frames L frames, & Z Frames Surface processing Green paint Color Painted color, stained color or customized colors Opening way horizantal, bi folding, sliding,