Deep groove ball bearing 1.GCr15, GCr15SiMn 2.High precision,long life 3.Excellent service 4.ISO9001:2000 SERIESBORE ... NR,ZN,ZNR640010-100N,NRMINIATURE BEARINGS3-10Z,ZZ,RS,2RS deep groove ball bearing1. with OPEN,Z,ZZ,RS,2RS,N,NR ... of friction, high limiting speed,high precision,5.robust in operation and normally require little maintenance6. dependable performance7. quality and quantity assured8 ...