1).Quality standard:ISO9001:2000 2).Material:GCr15,GCr15SiMn Gcr15-China, (AISI) 52100-USA, (DIN) ... 3).various of bearin Supply different kinds of good quality angular contact ball bearing,main features:1.Types:60series,62series,63series,,68series,69series,etc.2.Material:Gcr15-China,(AISI)52100-USA,(DIN)100CR6-Germany3. Sealing cover: Z, ZZ, RS, 2RS, RZ, ZNR, etc.4. Vibration and Noisy level: ...