High Quality Aluminum Windows, equipped with Thermal Breaks, separate the interior and exterior surfaces of the window to improve their energy efficiency.vinyl window is durable and remarkably energy efficient since it designed properly with interior webs strengthen the frame and improve its thermal performanceto, minimize thermal transfer.Various choices:for profile finished treatment:power coating,luorocarbon,electrophoresis as per required.for Glass: single,heat-reflection,low-e,clear tempered,laminated,ect.as required,that would be in different price.for hardware:imported or China hardwares with high qualityOptions:screen,sub-frame,grilles