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 that 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 that you check the vent before replacing it. Clogged dryer vent can cause fuse damage. 3977393 Tthermal cut-off switch safety assembly is 309F, Compatible if your existing fuse is 325F. 3977767 Cycling Thermostat- It acts as as safety mechanism that keeps the dryer from overheating. Once the dryer temperature reaches 221 degrees Farenheit, this piece will shut down power to the heating elements until it drops by 80 degrees Farenheit. Note: Take a picture before removing any parts, so you know how to restore everything at the end; Before installing this part, unplug the dryer; Wear work gloves to protect your hands; The designation of the brand name or model of this product is used to demonstrate compatibility only; If you are unsure our replacement part will fit your appliance model, you can ask us in Customer questions and answers section. At the same time, we suggest that you can disassemble the machine and check the model before purchasing accessories. colour:Silver Material:Iron +80 nickel wire Package Contents: 4 * 3977767 Dryer Thermostat 4 * 3387134 Dryer Thermostat 4 * 3392519 Dryer Thermal Fuse 4 * 3977393 Dryer Thermal Fuse Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.