Color: red and black, black and whiteProduct size: diameter 230×25mmMaterial: ABS plastic, magnet, cotton threadWeight: about 600 gramsMade of high quality plastic and magnet material, sturdy and durable to use.Designed according to the Laws of Conservation of Momentum and Energy, the balls will swing one to one, no electricity needed.Widely used for home / office desk decoration, art craft gifts or wonderful birthday gift.Package Contents:1* office decorationOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.