Dual-element design improves the heater’s flexibility over standard high-temperature tapes. Tapes are made of two heating elements that are knitted together in series and then wound together with high-temperature Samox fiberglass. The 1240 VAC tapes are supplied with bare leads. Warning: Heating tapes should not be overlapped and require the use of a temperature or power controller sold separately. What’s included: reusable tie straps