My dads tractor had a circulating coolant heater that was made by IH since the tractor was IH. This is aluminum and has the letters IH cast on it. I gave him a heater that was about brand new because his cord looked like it was about to catch on fire and had quit working. I am thinking about cleaning it up and putting a new cord on it if he doesn't want it to put on my truck. Although my truck has a good heater so I might just put it on my IH tractor.