72 series with bright drift window, super sound insulation, heat insulation. Not occupy indoor and outdoor space, energy saving and environmental protection. Surface processing: gold spray Gilt decoration, luxurious atmosphere, full of texture, create exquisite craft, bring stunning visual presentation. When the stress position is thickened, the hardness is stronger and the toughness is more favorable. EPDM sealant is formed once, forming vacuum closed environment, heat insulation and noise reduction.