说明

• Feature：Cradle BallNot solely demonstrates a pendulum, but additionally shows the legal guidelines of conservation of momentum and effort steel balls, plastic frames and base used as a toy Specification： Product color:Black base Product material:Metal Weight: 120g Product size:9*7*9cm Packaging:box-packed Package Included:1pc Note: Due to handbook measurement, there could also be mistakes within the dimensions and weight Please perceive Colors may have color differences due to points similar to light, saturation, and pixels We ask for forgiveness for any inconvenience prompted

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