Hi,
Check the pattern of bolt holes to confirm it will fit - most modern hitches have two bolts through the side of the coupling, but some have one side bolt and one vertical bolt.
If your caravan chassis was made by AL-KO (check the manufacturers plate) and it currently has an AL-KO tow-hitch, then it should be a straightforward job to replace with an AL-KO stabiliser coupling.
If you have a flange-plate tow-ball, then you'll need to buy the AL-KO extended neck ball for use with a stabiliser coupling, but if you have a swan-neck or detachable tow-bar - then these are always OK.
Robert