Hi there you are buying a 13pin Europe (uk and ireland) style Towbar coupling wiring harness for a ford transit custom/Tourneo. It will also fit the larger Mk8 transits. It's a 13pin plug monitor has the extra power supply wires for caravans for the fridge etc. This item is made by a local auto electrician with over 20years experience, so you get a good quality item for a fraction of the cost of the Ford price.
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