KOULATE Newton's Cradle - Steel Balance Balls Physics Science Desk Toy | Educational Office Decor & Stress Relief Gadget | Perfect for Home, Office Desk & Science Classroom Demonstrations

Description: This device demonstrates demonstrates conservation of momentum and energy via a series of swinging balls. Pull back one or more of the balance balls, release them and the same number of balls will swing up on the opposite side.Specification: Condition: 100% brand new Material: Plastic + Iron Color: Sliver Size: 9.2 x 7.5 x 9cm / 3.62 x 2.95 x 3.54 inch(appr.)Package Included: 1 x Balance Balls ToyNote: 1. Please allow 1-2 cm error due to manual measurement and make sure you do not mind before ordering. 2. Please understand that colors may exist chromatic aberration as the different placement of pictures