Our Mingrui Resistors are made of stainless steel and used for this application. Mingrui technology utilizes a continuous ribbon to eliminate all welds. By eliminating welds, hot spots are eliminated. To reduce the operating temperature, no thru bolts are used, and a parallel element system reduces the watt density. Finally, our resistors are designed to withstand vibration, and breakable parts are not used. All the results in the maximum operating life of our resistors. Rating: 10 seconds with a temperature rise of 760 centigrade Mounting: Intended for permanent outdoor installation Customer connections: Bus-bars, accessed through the bottom of the enclosure