2 x Caged ball bearings for FSA headsets. 

20 bearings in each cage at 5/32 inch size.

FSA name is  Ball Bearing MR013.

Solid as a pair , so complete for upper and lower cups.

Fits FSA headset No.10 & No.11 headsets.

5/32in Retainer MR013 (5/32inX20).