Two-Clock Mechanisms Size: Short total shaft length 16 mm (0.63 in), thread length 8mm (0.315 in), suit for 3 - 6 mm thickness clock panel. Long Total sharft length 23 mm (0.9 in),thread length 15.4 mm (0.6 in),suitable for 9 - 13 mm thickness clock panel, These two clock movements can be used for almost any home wall clock. Silent Clock Mechanism: clock movement use ultra-silent Scanning Design, Sweep clock movement without any noise which can offer your sleep a silent environment. All of your requirements are met by a simple and elegant design. Wide Application: DIY quartz wall clock replacement movement parts, suitable for cross-stitch, three-dimensional embroidery, craft clock, frameless draw clock, suitable for repairing, replacing, or making a clock, and also suitable for various styles of the clock frame (no battery) Measure the thread shaft of your old clock mechanism, if the length is shorter or equal to 5 mm, then this clock movement mechanism is suitable for your clock. Colour:As Shown Material:Plastic Package Contents: 2 * Quartz clock movement 15 * hand 2 Sets x Screw Washers 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.