... noise 1. saeling form: OPEN,Z,ZZ,RS,2RS,2RZ2. bearing type:ball bearings3. Cage(Retainer):Brass cage,nylon cage,steel ... :home appliances.low noise and high speed electric motors,auotomotive components,pups,machinery,Bicycle8. Normal export packing:color box,plastic tube,carton ... 10-190 N,NF,NJ,NU,NPNn 30-260 K,/W33,K/W33NNU 10-280 K,/W33,K/W33 High Quality Cylindrical Roller Bearing