The Erde COUPHD50 coupling head is designed to fit a 50mm wide drawbar.
This is a Winterhoff coupling head and will fit any standard 50mm towball.
It incorporates a locked on indicator, a key hole to suit the AV001 coupling lock and a useful stowage for the seven pin plug when not in use.
It is typically used on the Erde 102, 122 box trailers and the PM310 motorbike trailer.