Our company is committed to becoming a leader in the Bonded Washer, FKM O-Ringsds, FEP or PFA encapsulated o-ring in VMQ, ED ring in NBR industry, actively implementing a 'total quality management' system, and striving to achieve 'excellenct product and perfect service' based on the actual needs of customers. Zhonggao Seal Technology is one of the leading ED-Ring manufacturers and suppliers in China. Our factory has a wide varieties of ED-Ring products in stock. Please be free to buy the bulk products from us. And we will also offer the customized service if necessary.