clock movement size: shaft length is 17 mm/ 0.67 inch, the thread length is 9.7 mm/ 0.38 inches; Jump second movement, which is suitable for 2-6 mm/ 0.08-0.24 inches thickness clock panel.Hole center to the tip hand size: the hour hands measure . 70.5 mm/ 2.78 inch, 70 mm/ 2.76 inch and 82 mm/ 3.2 inch, the hands measure . 101 mm/ 3.98 inch, 92 mm/ 3.6 inch and 117 mm/ 4.6 inch, and 2 second hand are . 100 mm/ 3.9 inch, 1 second cap is . 7 mm/ 0.28 inch.Melody effect: the chiming movement plays the melody on the hour, automatically silences the after 9 o'clock pm until 6 o'clock am.Practical tools : these trigger clock movement are practical to design and make your own clock, help you to replace and change a different look; notice that the hands are made of aluminum, 't install with too much pressure or they will be bent.Colour: blackMaterial: plasticPackage Contents:1 * Swing movement 110x56x20mm1 * Gold 1 * Music box3 * Hour hand3 * hand3 * Second handOnly the above package content, other products are not included.Note: Light 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.