... 3. Pretty competitive price 4. Prompt delivery 5. ISO9001: 20 Self-aligning ball bearings are non-separable double-row radial bearings ... of balls can rotate in parallel within a spherical outer ring. Widely used for electrical household, electrical tools, machine, etc Material ... cage, etc Precision level: P0,P6 Vibration: Z1v1, Z2v2, Z3v3 self-aligning ball bearing