Newton's Cradle
$14.99
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This Newton's Cradle uses a high-quality nylon line that is strong enough not to be broken easily. The balance balls continue in perpetual motion for only 15-20 seconds due to the resistance of the air and friction but won't influence the effect of playing. However, it can not reach the seamless convergence among balls in the vacuum. Specifications: Material: Metal Size: 9X9.5X7.5CM
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