Profile uses two different bearings in their cassette hub drivers:
A. 6802 (15MM ID x 24MM OD x 5MM W)
B. 6902 (15MM ID x 28MM OD x 7MM W)
Some drivers use all the same type of bearings and others use a combination. Following is a guide of what bearings are in different cassette drivers.
-Profile Racing Mini, Totem or Madera cassette hub drivers use four 6802 bearings.
-All Profile Racing Elite cassette hub drivers use two 6802 bearings & one 6902 bearing.