309726 sealed bearingID 34mm, OD 64mm, Depth 37mmBack to back cone set Split inner racewaySuitable for use with ALKO type 2051 compact, Avonride X, Knott 160x35, 200x50 and 203x40 assembliesKnott reference - 45887.10Alko reference - 605124Avonride reference - SB069..