20 Pendulum Rods For American German Clocks. This is a new set of 10 pendulum rods and suspension springs. These are used in clock repair. You receive: 10 American clock pendulum rods that measures approximately 10" (254 mm) long 10 Pendulum suspension springs. We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.