... . Brand name famous brandSeries6000 6200 6300 6400 61800 61900 R series,F seriesRings MaterialStainless steel-440C,304 316 ,Chrome steel-GCr15, high ... Ball Bearings Serives 63001035110.05163011237120.06063031747140.11363052562170.23563073580210.464630945100250.829 Series Bore diameter(mm) Variant structure61800 10-320 Z,ZZ,RS ...