The top swivel of the Selden 20s furler has a bearing system similar to the 20s lower drum with 4 mm. ball bearings. This feature helps minimize friction thus allowing the swivel to do its job rather than twisting the halyard.
|Inside Width (in)||For eye: .39 in (10 mm)|
|Note||Top Pin Hole: .21 in (5.5 mm)|
|Additional Notes||Lower Pin: .23 in (6 mm)|