... size 2) Large range 3) Good quality and comptitive price Cam follower/Track roller1) Metric series and inch series:Matric series ... , RNA22...2RS, NATR,NATR...PP,NATV,NATV...PP, NUTR, ETC, KR, KRE, KR...PP, KRE...PP, KRV, KRV...PP, KRVE...PP, NUKR ... Roller Dia. UNSEALEDNART..VRNATVMCYRFYCR..R SEALEDNART..VUURNATV..PPMCYR..SFYCRS..R Cam follower/Track roller