The sealed cap 28 mm is used 18 times on a Madonna or Jibb frame, sealing all 28 mm bearings. Two pieces of the sealed cap 52 mm are used on the main pivot, sealing the 52 mm bearings.
- The sealed cap 28 fits the 28 mm bearings
- The sealed cap 52 fits the 52 mm bearings
- Fit the Madonna and Jibb