Umi O-Ring chains, exclusive in the US to NHJ Powersports, are designed and built in Japan. The Umi O-Ring chain offers rollers and bushings for longer wear life as well as reinforced rollers for a much higher impact resistance. The Umi O-Ring Chain also features protruding bushing, designed to reduce chain kinking and extend O-Ring life. The O-Ring helps to increase the performance of the chain and provide better sealing to keep the dirt out and the lubrication in. For more information visit www.nhjpowersports.com.