WarmlyYours Snow Melt 240V, 428 ft, 20.9A Cable FLEXIBLE CABLE-HEATING SYSTEM: WarmlyYours Electric Radiant Snow Melting Cables provide 107 sq. ft. of coverage with 3 in. spacing, removing snow and ice in the areas where you need it most without causing damage to decorative surfaces or landscaping, the 240 VAC twin conductor heating cable is perfect for unusually shaped patios, walkways or stairs. It measures  (6mm) in diameter and generates 12 watts per lineal foot EMBED IN CONCRETE, ASPHALT & MORE: These handy cables install easily in concrete, asphalt or in mortar underneath paver, 428 ft. cable draws only 20.87 amps from 240 volts, allows maximum flexibility for outdoor stairs, round driveways and cornered patios to protect your family and your investment AUTOMATIC OR MANUAL CONTROL OPTIONS: Available with several different control types (sold separately), each with different specifications to sense things like air temperature or moisture on the pavement, these snow melt heating systems can be set to operate via a timer or only when specific weather conditions are met, includes 20 foot (6m) of 14 AWG cold lead to adapt to the needs of your installation CSA CERTIFIED: WarmlyYours Electric Radiant Snow Melting Cables are CSA certified for outdoor use in Canada and the U.S., designed for quick and easy installation 10-YEAR WARRANTY: Limited 10-year warranty which covers parts and labor, 24/7 lifetime installation and technical supportat 800-875-5285, WarmlyYours also offers free installation plans