Specification:Material: Plastic + MetalSize: 9cm*7.5cm*9.5cm, ball diameter: 1cmNet weight: 0.1KGPacking boxesPacking size: about 10*8*4CMColor: silverFeatures:This desktop display model is a version of Newton's cradle, a device that demonstrates the conservation of momentum and energy through a series of swinging spheres of the same size.Newton's cradle has been around for a long time, and it is still a symbol of the scientific community today because it simply demonstrates an important law in physics.The device demonstrates the conservation of Newton's momentum and energy through a series of swinging spheres of the same size. When one ball at the end is lifted and released, the force generated crosses the line and pushes the last ball outward.Put it on your work desk and take a break from a stressful day by watching this soothing and attractive sculpture display.This can also be used anywhere in your home; the placement of this piece can create a tranquil atmosphere almost anywhere!Package includes:1*Swing ball ornamentsNote:1. Manual measurement, the size will have an error of 0.5-2mm, please refer to the actual size.2. Due to the difference in light and screen, the color of the product may be slightly different from the picture.