Supertek Ultimate Wire Helix, Wave Demonstrator with Stand (8 inches / 20 cm Closed Length, 30 feet Extended Length)
$49.99
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Product description Ultimate Wire Helix (Slinky) With a stand for storage. Useful to demonstrate both Transverse and Longitudinal waves. Closed length is 8 inches or 400mm. Fully extended length is over 30 feet! (10 Meters)
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$28.99
$49.99
(+$21)