Brief:* All windows and doors are made of lead-free and original uPVC materials. * UV resistance, Anti-aging and Long-lasting. * Glavinized reinforcing steels inside frames improve overall strengh. * Many options for glass based on different requests on abilities of sealing, noise reduction and keeping warm. * Customized apperance on color, pattern and design. * Optional Germany or Chinese famous brand hardware. * Complying with standards of CE,ISO,Rohs etc. * Strick quality control and test. * Great warranty and after-sale service.