This mini pendulum quartz clock movement is 2 1/8" wide x 3 3/4" high x 7/8" deep and has a 5/16" shaft diameter. This movement requires an 'AA' alkaline battery (not included). This movement is ideal for dials up to 5/8" thick. The overall shaft length is 1" with a threaded shaft length of 11/16". This movement includes a polished brass bob with a pendulum stick (16"). The length of the pendulum rod can be shortened down in 1" increments with convenient scored breakaway lines. Choose your own pendulum bob depending on the diameter you would like -
2 1/8" Bob (recommended size),
2 3/4" Bob or
3 1/2" Bob.