[Clock Movement Size]: Total shaft length is 12 mm (0.47 inches), thread length is 5 mm (0.2 inches); Jump second movement, suitable for 1- 4 mm (0.04 - 0.16 inches) thickness clock panel. [Silent & Accurate]: The sweep quartz clock movement not make any noise and offer great accuracy when it is working, so it provide a quiet environment when you are sleeping. [Easy Installation]: The battery clock mechanisms are easy to install, keep the hour hand and minute hand parallel when you install this clock movement kit. Please check the dimensions of this movement before purchase. [A Wide Application]: Clock mechanism kit suits well to different styles of clock frame, can be supplied to -, desk clock, three-dimensional embroidery, craft clock, frame-less draw clock and so on. Type:Clock Movements with Hands Kit Power:1.5V AA battery (not included) Colour:Black Material:Plastic Package Contents: 7 * Quartz clock movements 21 * clock hands 7 set * Accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.