Coiled cords and cables consist of a wire wound around a tubular axis. The result is a spring-like form that is able to stretch and bend with minimal stress on the wire. There are many types of coiled cords. Examples include coiled extension cords, custom coiled cords, and automotive coiled cords. Coiled extension cords are simple cords which have a very long length and can be extended to long distances. Custom coiled cords are designed according to a customer’s specifications. Automotive coil cords are cords that are used in automobiles. Coiled cords and cables consist of two parts: conducting and insulating materials. Coiled cords and cables have a conducting material inside and an insulating and jacketing material outside. Copper, aluminum, and various alloys are used as conducting materials and PVC, PE, and other polymers are used as insulating and jacketing materials. Other types of coiled cords and cables are commonly available.