100% Brand New and High QualityNot only demonstrates a pendulum， but also shows the Laws of Conservation of Momentum and Energy.Friction and damping effects are also observed.Often used as a toy to amuse people.Includes steel balls， plastic frames and base.Great gift for everyone.Original box: YesColor: Brown & SilverItem size: 90*76*92mmNet weight: 100gThe actual color with a little difference， please forgive me1 x Newton's Cradle Balance Balls Desk Toy