352 piece set: 1 pin, 2 pin, 3 pin, 4 pin super sealed waterproof electrical cable connector sets with nickel plated copper plug and socket and silicone rubber cable seal. Waterproof and durable : Made of high quality environmentally friendly materials with high chemical stability, electrical conductivity and oxidation resistance. Dustproof and fireproof, safer than normal connectors. Efficient connection: High-precision copper plating process is used to improve conductivity. Easy installation under soldering and crimping. High pressure connection, reliable, light weight.Protect your car and electrical appliances from short circuit and overload. Easy installation: The loop design ensures precise and complete insertion of the contact into the housing and prevents it from slipping off the connector. It can also be easily removed if necessary. Widely used: Suitable for various cable connectors of motorcycles, scooters, cars, trucks, quads, caravans, marine, jet skis, boats.