Shanghai G-ren Co., Ltd is a professional enterprise with rich experience in design,producing and selling of all kinds of PU as well as aluminium alloy profiles ,curtain walls , windows and doors .We have more than 20 people Tech group ,that could help our clients with any problems about OEM&ODM. G-ren has a brother company Younante which also have 23 years experience in this filed ,with a factory area of approximately 20,000 SQ and have more than 180 employees. Quality is our company culture and great service is our mission all the time . No matter on decoration , project or business , we have received many good feedback from all over the world .Our factory completed the mass production about the Polyurethane composite material for profiles of the windows and doors two years ago. We have mature Tech and could produce more than 200 Tons PU frames per month . This process of production is saving-energy and environmental .We have acquired the design and production reputation from china government ,and become the model business in this field. the The PU windows and doors have better in fire resistance,soundproof ,thermal insoluation,ect. It also could adapt to a variety of environments , no matter on cold ,heat , dry or hurricane circumstance .