... contact ball bearing- Single and duplex arrangement: Series 78, 79, 70, 72, 73- Single and duplex arrangement, high precision grade: Series 78C, 79C, 70C ... filling slots: Series 52, 53 With filling slots: Series 32, 33- RM-ZZ, RM-2RS series- LFR-, LR- series steel cage and nylon cage available ...