Yuanda established in 2003,our factory is located in Jieyang city, GuangDong province, China. We specializes in manufacturing and marketing the best quality door& window hardware.The friction hinge and nylon roller are widely sold in markets. For now,our products cover more than 1000 varieties in more than 100 series,including the complete specification of friction hinges. Every three months, we can self-developed a new products,we are able ...