High speed low noise Reliable quality GCr15 stainless steel chrome steel carbon steel Block Type:P F FL FC T CC SN Jinan Shengtuo ... individual bag+individual packet+outer box+wooden pallet4.Retainer:Copper,steel,nylon,bakelite retainer,etc.5.Application:automotive,electrical,construction machinery ... UCFC,UCT,UCC size7.Quality standard : ISO9001:20008.Material: Bearing steel, chrome steel or carbon ...