We will continue improving and strengthening the quality management system to ensure that our Bulk FEP or PFA encapsulated o-ring in VMQ, Bulk soild O-Ring Cord, many color rubber ball meets the highest industry standards. Zhonggao Seal Technology is one of the leading X-Ring manufacturers and suppliers in China. Our factory has a wide varieties of X-Ring products in stock. Please be free to buy the bulk products from us. And we will also offer the customized service if necessary.