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 1/4" thick. The overall shaft length is 5/8" with a threaded shaft length of 5/16". 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 size of pendulum bob -
2 1/8" (recommended size) ,
2 3/4" or
3 1/2".