Features: 1) Series: 62 , 60, 63, R, MR, 1600, 62200, 62300, Flange and OEM drawings 2) End cover: open, ZZ, or RS 3) Material: Cr steel or stainless steel . if you want low quality bearing, we can also supply carbon steel bearing. 4) Vibration and noise level: Z1, Z2, Z3 5) Precision level: P0, P6, P5 (ABEC1, ABEC3, ABEC5) 6) Radial clearance can be made according to clients' needs