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Established in 2026, Dalian Oppgate Glass Windows & Doors Co., Ltd. is a professional manufacturer and global supplier of high-performance architectural glass, aluminum windows, and doors, based in Dalian, Liaoning, China. Drawing on 20 years of industry experience, we specialize in energy-efficient solutions, such as thermal break aluminum windows, UPVC doors, and premium slim frame double-glazed sliding doors. Operating a specialized facility under 1,000 square meters, we offer comprehensive OEM and ODM custom design services for builders and contractors worldwide. Our products hold CE certified quality, backed by dedicated quality inspection, serving major global markets including North America, South America, and Europe.