Headset bearings in a retainer. This size is typically for some BMX headsets, particularly from Japan.
* 3/16" carbon steel ball bearings
* Bearing retainer holds 15 bearings
* 39mm outer diameter / 29mm inner diameter retainer
* NOTE the "flat" appearance of one side of the retainer (shown in the 2nd photo) - be sure this is the type bearing you need. This is the correct bearing for many Japanese loose ball headsets.
* Great to restore an original headset that has pitted or worn bearings