Application: Suitable for 3pin European trailer connectors and works with caravans, trucks, RVs, boats and trailers. Function: Waterproof design with a silicone waterproof rubber gasket; 3pin towing plug is rustproof and durable. Item: 3 Pin Trailer Plug and Socket, enabling connection between towing vehicles and additional trailers. Size: Plug 7.6 cm (2.99 in); Socket 6 cm x 4 cm (2.36 in x 1.57 in). Why you need it: provides a reliable, weatherproof connection between tow vehicles and trailers, preventing water ingress and corrosion to extend connector life and improve towing safety. Key benefits: Compatibility with 3pin European trailer systems for wide applicability across vehicles and trailers. Waterproof construction with a silicone gasket to resist rain, splashes, and outdoor use. Rustproof materials ensure durability in various environments. Compact plug and socket sizes for easy installation and versatile mounting. Use scenarios: Replacing worn or damaged connectors on a caravan tow setup to ensure dependable power and signaling to a trailer. Upgrading a fleet of vehicles and trailers to a single, reliable 3pin connection standard for easier maintenance. Using in outdoor or marineadjacent environments, where the waterproof gasket helps protect the electrical connection during wet conditions.