... Cage(Retainer):Brass cage,nylon cage,steel cage4. Quality level:Reach the same level as Japanes and ... after confirming P/O6. Feature:low voice,high speed,long life7. Application:home appliances.low noise ... and high speed electric motors,auotomotive components,pups,machinery,Bicycle8 ... N,NF,NJ,NU,NPNn 30-260 K,/W33,K/W33NNU 10-280 K,/W33,K/W33 High Quality ...