Our company is a private enterprise mainly operating a variety of imported well-known high-end brands many color rubber ball, white PTFE Back-up Ringds, Bulk high oil seal in NBR FKM SILICONE PTFE PU, Y-Ring and advocating the enterprise spirit of professional, pragmatic, efficient, and innovative formed a good internal mechanism. Zhonggao Seal Technology is one of the leading O Ring manufacturers and suppliers in China. Our factory has a wide varieties of O Ring products in stock. Please be free to buy the bulk products from us. And we will also offer the customized service if necessary.