Dryer drum drive motor assembly with pulley. The pulley is not available separately from the motor assembly. If the dryer does not run look for a defective door switch or start switch before replacing the motor. If the motor hums or buzzes and cannot be turned by hand then it is likely defective.
Dryer drum drive motor assembly with belt pulley
Dryer drive motor replacement kit
Washing Machine Motor, 2 Speed, With Pulleys