... capacity optional: 100L,150L,200L,240L,300L,400L,500L18, working temperature: 90 degree19, cold resistance: -38 degree20, easy installation and ... in one-way. Little capacity. The heat pipe starts to work fast at low degree. 2. Thermal conductivity working fluid ... tube gets minus 400º C for having good low-temperature-resistance. 4. Heat pipe owns super thermal conductivity with almost no resistance. ...