Suitable for 7-pin heavy european standard trailer.Establishes a secure connection between your major vehicle and the additional trailer; transfers the electronic signal lights from the vehicle to trailer.Supplies power to your caravan, towing and truck.Brass pins in a durable metal housing.Waterproof for all road and weather conditions.item type: electrical plug & socketsitem name: 7-pin trailer plugmaterial: aluminumcolor: silverinput: 12vitem size: 9.2(h) 4(d)cm / 3.6(h) 1.6(d)inpackage list: 3 x 7-pin trailer plugOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.