Conch system doors and Windows use high-quality plastic steel (PVC-U)/aluminum alloy profiles, with automotive grade EPDM sealing strip and exclusive custom hardware system and other configurations, products cover system doors and Windows, silent Windows, ultra-low energy passive Windows, refractory Windows and sun room and other product series. The conch system doors and Windows not only have beautiful appearance, but also have the characteristics of quiet noise reduction, energy saving and insulation, anti-mosquito anti-theft, excellent sealing and soon.