Dryer drum belt, length 88.75" x width 1/4". If the drum does not turn, but you can hear the motor running then there is a good chance the belt has broken.
Dryer drum drive motor. Includes pulley for dryer drum drive belt. Other shaft has reverse threads for blower wheel. Common symptoms of a bad drive motor are:
-Dryer stops turning during cycle
-Dryer won't start
-Dryer won't turn at all
Check out Repair Help for more information.
Start switch, dryer, turn type