Looking for 16-2C speaker wire? The Ethereal 16-2C 16 Gauge Black Speaker Cable comes unshielded with an overall PVC jacket. It is ideal for indoor use, with applications like intercom systems, security systems, sound, background music, and power-limited control circuits. Jacket thickness is .018 in. and insulation thickness is .012 in. nominal. Overall cable diameter is .204 in. The 500 ft. of cable comes in a tangle-free pull box.