... Good quality and comptitive price Track roller bearing1) Metric series and inch series:Matric series: STO, RSTO, NA22...2RS, RNA22...2RS, NATR,NATR ... PP, KRE...PP, KRV, KRV...PP, KRVE...PP, NUKR, ETCInch series: CRY...V, CRY...VUU, ETC, CR, CRH2) Material: GCR ... the suffix X indicates a cylindrical outside surface: e.g. NATR5 X or NATR5 ppx 4) Drawings and parametersManufacturers abroad IKOINA/SKFMc ...