Deep Groove Ball Bearing Features: 1) Series: 60, 62, 63, 16, 68, 69 2) End cover: open, ZZ, or RS 3) Material: Cr steel or stainless steel 4) Vibration and noise level: Z1, Z2 5) Precision level: P0, P6 (ABEC1, ABEC3) 6) Radial clearance can be made according to clients' needs Deep Groove Ball Bearing Features: certificate:ISO9001:2000 silver parts Deep Groove Ball Bearing Features: 1) Series: 60 2) End cover: open, ZZ, or RS 3) Material: Cr steel or stainless steel 4) Vibration and noise level: Z1, Z2 5) Precision level: P0, P6 (ABEC1, ABEC3) 6) Radial clearance can be made according to clients' needs