High quality Deep Groove Ball Bearings can be manufactured to your specifications. Detailed Description 1) Model: Open, Z, ZZ, RZ, 2RZ, RS, 2RS 2) Quality level: Reach the same level as the Japanese and European bearings 3) Tolerance level: P0, P2, P4, P5, P6 4) Noise Level: EMQ V1 Z2, EMQ V2 Z3, EMQ V3 Z4, EMQ V4 5) Application: Home appliances, low noise and high speed electric motors; Automotive components, pumps, machinery.