Coleman Cable 18-1-15 Copper Primary Wire, 18-Gauge, Green, 33-Foot. Contains 33-Feet of primary wire. 18-AWG wire with Green jacket. PVC insulation resists water, oil, chemicals and abrasion. 18-Gauge has 0.092-Inch outside diameter, 33-Foot length. Copper wire commonly used for low voltage wiring in vehicle electrical systems. 33-Feet of 18-gauge stranded bare copper, with a PVC insulation. Industry Approvals: SAE Standards and ROHS compliant. Coleman cable is an industry leader in copper wire, offer multiple lengths, thickness, gauge, color. The Road Power (R) brand is a registered trademark of Coleman Cable Inc. .