Usually there are three components to a clock pendulum assembly. The pendulum, leader and suspension spring.
NOTE: Suspensions do not have to be exact in length, if the clock runs slow then raise the pendulum bob with the screw at the bottom of the pendulum rating nut threads. If the clock is running fast then turn the nut as too lower the pendulum bob.
The suspensions in the picture are not actual size, you will need to measure your broken suspension spring the best you can and select the closest size in the drop down list by the order button below.