Detailed Product Description Mini Ball Bearing1.Metric Series, Bore Dia.: 1-12mm, 68x, 69x, MR8X, MR9X, MR6X2.Metric-Flange Series, Bore Dia:2-9mm, FXX,MFXX series.3.Inch Series, Bore Dia.1.984-9.525mm, Rx Series.4. Inch R-Flange Series, Bore Dia.1.984-9.525 FRXX series5.Miniature Bearings Thrust Series.F2-6------F10-18M TypeBore Diameter(d)Outer Diameter(D)(b)Widthopenzz681131-69141.6-681Xzz1. ...