Available in copper or aluminum, Ultra-Slim Heat Pipes use water as working fluid, continually alternating between evaporation and condensation. Constant cycling of water is caused by high-capillary mesh wick inside, which allows for cooling capacities from 5–35 W. With minimum achievable thickness of 0.6 mm, bendable heat pipes are suitable for LED modules, tablet PCs, mobile phones, and other electronic devices that require cooling within extreme space limitations.