The Balboa 58031 M7 Heater Assembly is developed with patented M7 technology for reliability and quality construction. It features a stainless steel housing and is front-mounted for simple serviceability. Measuring 15" in length with 2" x 2" unions, it uses 4.0kW for efficient and fast operation. Lead end terminal position at 4-1/4". Threaded tap position is 13" from leading end and 2" from leading end.