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.Specifications:Original box: YesColor:Claret-red Base& Silver FrameSize: 178x110x145 mm(LxWxH)Weight: 162gQuantity=1Package included :1 x Newton's Cradle Balance Balls Desk Toy