The RRD STD Cardan mast base uses a mechanical universal joint to let you easily connect sail to board, when the sail is lying flat. Great for SUP boards also.
This RRD STD Cardan mast base is ideal for beginner riders, junior riders, and for use on windsurfable SUP boards.
The mechanical joint allows you to easily connect a sail to a board, in the water, when the sail is lying flat in the water.
Has standard Euro pin on top...and standard mast track fitment on the bottom (machined brass nut).