Description:Function: It can study science and relieve pressure, funny and practical.Gift: It is a good gift for birthday and holiday to family, friends, children.Multipurpose: It is not only a toy and teaching supply, but also is a good desktop ornament.Teaching: It shows the laws of conservation of momentum and energy.Application: It is suitable for home, office, school or other places.Specifications:Product name: Newton Cradle Balance BallColor: Black, White, Red, Yellow, GreenMaterial: PlasticApplication: Suitable for home decorationSize: As below:M: About 13.5 x 11.5 x 13.5cm/5.31 x 4.53 x 5.31 inch(L*W*H)L: About 18 x 15 x 18cm/7.09 x 5.91 x 7.09 inch(L*W*H)Package Includes:1Pc* Newton Cradle Balance BallNote:1. Due to the light and screen difference, the item&039;s color may be slightly different from the pictures.2. Please allow 0.5-2 cm differences due to manual measurement.