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# What is a CM Length?

${vimeo}[CM Length](777457837)

CM Length is a measurement we use at clockworks to identify which clock movement and or pendulum you need. CM = centimeter.
 
To find your length we need too measurements 

With the pendulum hanging on the clock please measure from the top plate to the tip of the pendulum.
Remove pendulum from the clock and measure actual length tip to tip.

A photo and this information will help us confirm the correct replacement movement.