Nantong Sinogrates Composite Composite Material Technology Co., Ltd. is a high-quality manufacturer and supplier of pultruded window frames. Our commitment to excellent service begins with using only the highest quality materials to produce our frames. Our pultrusion process ensures that our window frames are lightweight yet durable and resistant to corrosion, making them the perfect solution for both residential and commercial applications. When you choose Nantong Sinogrates Composite for your pultruded window frames, you can be sure that you are getting a product that will withstand the test of time. Our frames are designed to meet the most stringent industry standards and are available in a variety of colors and finishes to complement any architectural style. With our superior product quality and unparalleled service, Nantong Sinogrates Composite is the clear choice for all of your pultruded window frame needs.