Focket Newtons Cradle - Square Balance Pendulum Physics Toy with Solid Metal Balls | Classic Office Desk Decor & Educational Gift for Teachers, Kids | Perfect for Home Study, Office Decor & Science Learning

This device demonstrates the conservation of momentum and energy through a series of pendulum balls. Pull back one or more balance balls and release them, the same number of balls will swing up on the other side. Specification: Condition: 100% Brand New Material: ABS Plastic, Tough Fish Line, Solid Metal Ball Size: S, M, L (optional) S Size: Base Size: Approx. 7.3 x 8.8 cm / 2.9 x 3.5 in Height with Base: Approx. 9.4cm / 3.7in Frame Size: Approx. 8 x 7 cm / 3.2 x 2.8 in M Size: Approx. 14 x 11.5 x 14.5 cm / 5.5 x 4.5 x 5.7 in L Size: Approx. 17.5 x 14.7 x 18 cm / 6.9 x 5.8 x 7.1 in Ball Size: Approx. 2cm / 0.8in Base Height: Approx. 2cm / 0.8in Weight: Approx. 94g-404g / 3.3 oz-14.3 oz Package List: 1 x Pendulum Ball Toy Note: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.