Heavy Duo-Tapes® are heating tapes with a protective AMOX™ overbraid and may operate to exposure temperatures of 1400°F (760°C), and are available in ½ inch and 1 inch widths and lengths from 2 feet to 16 feet. These are Heavy Insulated Tapes that may be used on metal conductive surfaces, as well as glass and ceramic. The serpentine DuoTape® element provides flexibility and durability which allows both power leads to be on one end. The knitted construction, allows for flexibility and even distribution of heat. This model is offered in three watt densities: Low 3.25, Medium 8.67, or High, 13 watts per square inch, for the most aggressive heat response. Do not overlap this element.