Our company specializes in selling orange PTFE Back-up Ring, Rubber Seal Ring, and is recognized by the industry with our integrity, strength, professionalism and product quality. Zhonggao Seal Technology is one of the leading Y-Ring manufacturers and suppliers in China. Our factory has a wide varieties of Y-Ring products in stock. Please be free to buy the bulk products from us. And we will also offer the customized service if necessary.