Pendulum clock movement size: total 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 minute 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 pendulum movement plays the melody on the hour, automatically silences the chimes after 9 o'clock pm until 6 o'clock am. Practical tools : these pendulum trigger clock movement replacement parts are practical to design and make your own pendulum clock, help you to replace and change a different look; Please notice that the hands are made of aluminum, don't install them with too much pressure or they be bent. Colour: black Material: plastic Package Contents: 1 * Swing movement