Part Ref: 6901-2RS Bearing ID: 12mm Bearing OD: 24mm Bearing Thickness: 6mm Material: Chromium Steel GCR15 (Race & Balls) Used On: Easton, Mavic, FSA, Fulcrum, HED, Zipp Grease: SINOPEC HTHS Bearing Grease, 30% filled Seal: Double-sealed 2RS