Hangzhou runfeng sealing industry Co., Ltd is a professional ISO9001 O-Rings sealing producing company. We have advanced equipments and technology. We integrate the producing, scientific research, design and sale. Providing you high quality rubber o-rings, seal products. Our main products including o rings,extrude rubber,o ring kits,hardware kits,o ring cord,ptfe products and so on,our concrete material is NBR, EPDM, FKM, VMQ, HNBR, CR, PU, SBR, PTFE and so on. With a wide range of products, we continuously improve our QC with investments into material research and development. We continuously produce a variety of quality products for every application. "Quality is the life of enterprise, Credit is the foof of company, customer is our god, ambition is our impetus".