3387134 High limit thermostat when the cycle thermostat temperature failure,the temperature can not be adjusted, when the temperature reaches 155 degrees Celsius, the high limit thermostat will cut off the current. 3392519 The dryer thermal fuse USES the dryer as a safety mechanism prevents current from flowing to the motor circuit when the dryer overheats.The hot fuse is disposable and cannot be reused. When your dry thermal fuse helps you solve the high temperature risk, please replace it in time. We recommend you check the vent be suitable fore replacing it. Clogged dryer vent can fuse damage. 3977393 Tthermal cut-off switch safety assembly is 309F, if your existing fuse is 325F. 3977767 Cycling Thermostat- It acts as as safety mechanism keeps the dryer from overheating. Once the dryer temperature reaches 221 degrees Farenheit, this piece will shut to the heating elements until it drops by 80 degrees Farenheit. Note: Take a be suitable fore removing any parts, so you know how to restore everything at ; Be suitable fore installing this part, unplug the dryer; Wear work gloves to your hands; The designation of the brand name or of this product is used to demonstrate compatibility only; If you are unsure our replacement part will fit your appliance , you can ask us in Customer questions and answers section. At the time, we suggest you can disassemble the machine and check the be suitable fore purchasing accessories. colour:Silver Material:Iron +80 wire Package Contents: 1 * 3977767 Dryer Thermostat 1 * 3387134 Dryer Thermostat 1 * 3392519 Dryer Thermal Fuse 1 * 3977393 Dryer Thermal Fuse Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.