Liaocheng Hong Yu Metal Co.,LTD was founded in 1994 with a long history and experience in exporting washers worldwide by own trade company----Qingdao Dukyang Trade Co., Ltd. Hong Yu Metal mainly produce flat washers, spring washers, stamping parts, nut and other mechanical parts in kinds of standards, specifications and materials (A2,A4,A3,Brass steel and so on).Customers from Russia, Taiwan, India, Brazil, Greece, America, South Korean and many other countries have already established agreeable and mutual benefit business relationship with us and highly appreciated our professional service.