InfoInner Diameter - 38.23mm,Outer Diameter - 66mm,Width - 15.87mm,Products compatible with this Stub Axle Bearing:6306 - Spindle RHFits the following Massey Ferguson Series':100 Series,200 Series,Pre 100 Series,3000 Series,500 Series,600 Series.See "Tractor Compatibility" for more details on what models this product fits.