Any interest, pls contact : Ellen Zhang Tel: 8618068536660 E: ellen@chinasuma.com Changzhou Suma Precision Machinery Co.,Ltd is factory producing one way clutch bearings / backstop clutch / needle roller bearing over 20 years . OEM / ODM is avaliable , provide 1 Year Warranty; Free Sample is available for quality check . Welcome to visit our website : http://www.chinasuma.com