Bearing,roller bearing,slew bearing. detail dimansions and classsifications,please check on our company website. Bearing,roller bearing,slew bearing.Part No.Dimension(MM)Bearing/BallRateDdFECNo.DiakgFM223-0800H22.38.125.49.64.0153.1860FM388-1110H38.811.542.122.29.5117.1470FM577-1860H57.617.561.940.422.4119.53138More optional size,please contact us to obtain the detail catalogue. FM BEARING