This is the same bearing that is shipped in the Focus V2 and the Focus Gamma. It is a radial, open, unflanged, 10 ball, stainless steel, ABEC 3 with dry lube. Dimensions are .500 inch diameter, .250 inch bore and .125 inch wide. This bearing is manufactured by New Hampshire Ball Bearing. Their catalog part number: SSRI-814RA3P25LD.