This product is sold by: Unit.Dimensions: 4.72 X 4.72 X 2.17–10 Gauge BLACK Power Cable –Economy OFC (Oxygen Free Copper) wire–Finely stranded OFC wire–Insulated for chemical and heat resistance–High temperature rating–Extremely flexible and bendable jacket–Translucent “”matte”” insulator–100 foot spool with 5.0mm cable diametern