6 OEM Accurate Reel Sideplate or Tention Cam Bearing ATD 6 12 30 50 50W L-1532?  Retails at $15.00 each, so $90.00 worth here.  It's either the sideplate bearing (L-1532) or tension cam bearing (L-1358).  If it is the sideplate bearing it only fits ATD 6, 12, and 30.  If it is the tension bearing it fits all listed in the title according to the packing list.  It is a little under 13/16" diameter.