Physics Science Accessory Desk Toy Newton's Cradle Steel Balance Ball

Feature: new and high quality. Quantity:1pcs. Material: metal and plastic. Color: show as picture. Not demonstrates a , but also shows the Laws of Conservation of  and Energy Friction and damping effects are also observed Includes steel balls, plastic frames and base Size:9x 7.5x 8.5cm. Net Weight: Approx 90g. Easy and convenient to use.   Package Include: 1 x Balance Balls Desk Physics Science Desk Toy.   Material: Polyester

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