Edge-wound coil springs, such as the Slinky toy, are made of special flattened wire.

Although usually circular in cross-section, wire can be made in square, hexagonal, flattened rectangular, or other cross-sections, either for decorative purposes, or for technical purposes such as high-efficiency voice coils in loudspeakers. Wire comes in solid core, stranded, or braided forms. The term 'wire' is also used more loosely to refer to a bundle of such strands, as in 'multistranded wire', which is more correctly termed a wire rope in mechanics, or a cable in electricity. Wire gauges come in various standard sizes, as expressed in terms of a gauge number. Wire is commonly formed by drawing the metal through a hole in a die or draw plate. Wires are used to bear mechanical loads or electricity and telecommunications signals. Sample diameter 40 mm.Ī wire is a single usually cylindrical, flexible strand or rod of metal. The conductor consists of 7 strands of steel (centre, high tensile strength), surrounded by 4 outer layers of aluminium (high conductivity).

Air instruments bundle 12