Coaxial Cable - A high capacity cable used in comunications and video, commonly called coax. It contains an insulated solid or stranded wire surrounded by a solid or braided metallic shield, wrapped in a plastic cover. Fire-safe teflon coating is optional.

 Although similar in appearance, there are several types of coaxial cable, each designed with a different width and impedance for a particular purpose (TV, baseband, broadband). Coax provides a higher bandwidth than twisted wire pair.