This thermal cut-off kit for a dryer includes one high limit thermostat with a limit of 250 degrees Fahrenheit, and one thermal cut-off fuse (309 degrees). The thermal cut-off (fuse) is meant to trip at a higher temperature than that of a high limit thermostat. This is a one-time use fuse, so when it does trip, you must replace it. The hi-limit thermostat acts as a safety mechanism that keeps the dryer from overheating. Once the dryer temperature reaches a certain point, this piece will shut down power to the heating element. This genuine OEM kit also includes flat heaters with jumper wires. Make sure to disconnect the power source to the dryer before beginning this repair.