Baseplate - Low profile baseplate with UJ saver and M10 North pin. 

Master joint baseplate Boge - Base plate with UJ saver, with original Boge joint and 10mm North pin. Also available completed with cup and rope.

Master joint baseplate - Base plate with UJ saver  and 10mm North pin. NOT the Original BOGE joint

Cardan - Cardan (also known as Knuckle or Mechanical) Recommended by STX for use with their inflatable.