This 4,000 ft coil wire is labeled minimum 180,000 PSI, but has tested at a minimum of 200,000 PSI with up to 1500 lb. breaking strength. It is 12.5 Gauge, with Class III galvanization which resists rust up to three times longer than traditional farm store electric fence wire. The price and quality make this wire very popular. Ships FOB Please call for shipping total.