We are a manufacturer for Rubber Oring, HNBR O-Ring, HNBR X-Ring, high strength bonded seal in NBR FKM that you can always trust. Zhonggao Seal Technology is one of the leading Oring Silicone manufacturers and suppliers in China. Our factory has a wide varieties of Oring Silicone products in stock. Please be free to buy the bulk products from us. And we will also offer the customized service if necessary.