Our company is a professional manufacturer specializing in urethane & rubber roller for elevator & escalator.our company have been providing all kinds of urethane and rubber rollersfor OTIS in Korea for over 25 years andHanger roller,Door shoe for MITSUBISHI in Japan and Korea for 5 years.We have been exporting several kinds of Guide roller for OTIS in USA and Eroupefor over 5 years.Regarding the quality of our products, we have fully equipped with state-of-the-art facilitiesand the quality is proved to be more than adequate by OTIS and MITSUBISHI.Please visit us at www.diroller.com for more information about us.Thanks a lot.