Products Detail Kg/m: 1.670 pcs/pac: 4 Color： Multicolor Material： UPVC Usage/Application： Door and Window Thickness： 2.5mm Country of Origin： Made in China Product Description Sound insulation of plastic steel windows is good. The sound insulation performance of steel aluminum windows is about 19 dB, and the sound insulation performance of plastic steel windows can reach more than 30 dB. In …