... steel,super light and thin ball bearings,F series and 16 series. 2.The stainless steel bearings manufactured by ... stainless steel 6000 series,6200 series,6300 series,62200&62300 series,6800 series,6900 series,R series,and inch 1600 series,etc.Open cage, ... or cages ZZ,RZ,2RS all okAISI 440C1% C, 17 ...