Used single-temp Chicken Hawk warmers in superbike size (180-200 rear tire). Older model, but still work great. Also includes replacement thermostats for high and low temps. I recently replaced the elastic pull strings, and will include extra elastic. Comes in hard plastic carrying case. Power indicator light on the rear warmer stopped working, but they still work just fine. Attached pic is best I have right now, but I'll post some pics when I get home tonight. $150 shipped within CONUS