... 3.1kg 3. Reasonabl price,fast delivery axial load thrust ball bearings SS51411:1.ID:55mm,OD ... Cage(Retainer):Brass cage,nylon cage,steel cage3).Quality level:Reach the same level as Japanes ... and European bearings4). Feature:low voice,high speed,long life5). Application:home appliances.low ... noise and high speed electric motors,auotomotive components,pups,machinery ...