Size: Total shaft length: 8mm,without thread Total shaft length: 14.5mm, Thread length:6.7mm Total shaft length: 17mm, Thread length:9.7mm Total shaft length: 20mm, Thread length:11.7mm Total shaft length: 22.5mm, Thread length:14.5mm Total shaft length: 28mm, Thread length:19mm Total shaft length: 31mm, Thread length:24mm Wide application: they are fit for cross-stitch, three-dimensional embroidery, craft clock, frame-less draw clock, and specially suitable for DIY quartz wall clock replacement movement parts, etc. Good DIY clock supply: suitable for repairing, replacing the broken parts of a clock or serving as good handwork material to make a clock by yourself. Specification: Material: Copper, Plastic. Match power: this clock movement replacement just need 1 piece of 1.5V AA battery( battery is not included in this package) Package Includes: 1 Piece Quartz Wall Clock Movement The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.