A device that demonstrates a pendulum and illustrates the conservation of energy. A calming and relaxing object for your workspace, home, or any indoor environment while working, playing, or resting. Constructed from metal and ABS plastic, it is durable, corrosion-resistant, and polished for a clean finish. Available in three sizes: S, M, and L. Suitable for use in offices, homes, and other indoor locations. Item Name: Newton Cradle Material: ABS, Metal Size Details: [Size S] Length: 8.5cm/3.3", Width: 7cm/2.8", Height: 9cm/3.5" (Approx.) [Size M] Length: 13.5cm/4.9", Width: 11.5cm/4.5", Height: 13.5cm/5.3" (Approx.) [Size L] Length: 18cm/7.1", Width: 15cm/5.9", Height: 18cm/7.1" (Approx.) Notes: Due to variations in lighting and screen settings, the item's color may differ slightly from the images. Please allow minor dimensional differences due to manual measurement. Package Includes: 1 x Newton Cradle