12-AWG Machine tool wire has outside diameter of 0.156-Inch. The copper tool wire has yellow jacket to withstand harsh environmental conditions. The 0.03-Inch thermoplastic insulation resists electrical leakage and offers protection against environmental threats. It has voltage rating of 600-Volts. It withstands temperature rating of 90 deg C/60 deg C. It is ideal for use in internal wiring of electrical equipment in dry or damp locations. This 500-ft cable comes in a spool. Cable is CSA certified, UL listed and RoHS compliant.