Usage Tips:[Package Include]: There are 100 female and male connectors in different sizes in 5 colors, 50 female connectors and 50 male crimp connectors in a transparent box with compartments. Each color has 5 female connectors and 5 male connectors, which is enough for your different needs. [Material]: The cable connectors are made of copper and insulated PVC, which has resistance to high tensile and elongation. The electrical connector protects the joints from water and corrosion, which is durable for long-term use. [Easy to use]: The crimp of the electrical wire connector is fully insulating and protects electrical connections, more reliable than conventional crimp terminals. The insulated male and female connector is easy to connect with electric wire to strengthen its reliability and safety, no soldering, easy to operate, even a novice can use it easily. [Wide Application]: Automotive electrical connectors are suitable for most occasions, such as household appliances, audio speakers, cars and other electrical wire connection projects. The insulated lug is easy to connect with the power cable to enhance its reliability and safety. [Multicolor]: 5 colors: blue, red, yellow, green and black, useful for distinguishing between different specifications crimp terminals and make the wires cleaner and more beautiful.