This 250-foot spool of 14 AWG marine-grade primary wire is engineered for boat electrical systems. The tinned copper construction resists corrosion and electrolysis in harsh marine environments, while ultra-flexible stranding prevents fatigue from vibration and flexing. The premium vinyl insulation maintains flexibility in extreme cold down to -40 degrees Fahrenheit and resists damage from salt water, battery acid, oil, gasoline, and ultraviolet radiation. Rated for 600 volts with a temperature range of 105 degrees Celsius dry and 75 degrees Celsius wet, this wire meets or exceeds UL 1426, US Coast Guard Charter boat, and ABYC standards.