ball bearings a)material ; chrome steel(Gcr15) b)6201,6202,6301,6300,6001,6002 c)use for motorcycle,furniture d)ISO9001:2000 1.Material: Chrome steel,Stainless Steel2.Quality certificate: ISO9001:20003.Brand : GB ,SOHO , JWZ4. Closure type : Open, Z, ZZ, RZ,2RZ,RS, 2RS5.Tolerance level: ABEC-1 (P0), ABEC-3 (P6),ABEC-5(P5)6. Noise Level: EMQ V1 Z2, EMQ V2 Z3, EMQ V3 Z4, EMQ V47.Packing: individual ...