Mica Strip Heaters. RS Pro strip heaters are economical heat sources, suitable for providing heat to flat surfaces. The heaters feature a high temperature oxidation metal sheath and high grade mica insulation resistant to moisture and high temperatures. Nickel/Chromium resistance wire is evenly wound to provide uniform and reliable heat distribution. Fibreglass lead wires Leads come out of same end of the heater Leads rated to 850°F Heater provided in variety of lengths and wattages