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Stretches to 30 ft. The Slinky Spring with three times the normal length is ideal for demonstrating several fundamentals of wave motion. When the

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Spring, Metal, Large (Giant Slinky®), Measures 3-1/2 In Diameter And 3 Long. Stretches Up To 30 Ft.

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Slinky Mini Metal Assorted Colours – Plato's Wonder. Create. Discover

Wave Form Helix Spring, 4 Closed Length x 3 Diameter - A Scientist's Version of The Classic Toy - Extra Long - Eisco Labs : Toys & Games

The Original Giant Slinky Walking Spring Toy