What makes a HyperSpring unique? HyperSprings have thicker coils than a cheap slinky, which makes them durable, easy to untangle, and capable of a ton of mesmerizing tricks. They are designed by Slinky Josh to be the perfect proportions for performing the widest variety of springbending tricks. Plus, they're protected by our unconditional 30 Day Money Back Guarantee. Check out some of the tricks that are possible with a HyperSpring: It's EASY to untangle! Just follow these instructions: HyperSprings are blacklight reactive - perfect for festival season! They will glow under UV lights (blacklights), or even blue lights. This is what the Opaque Rainbow looks like under blacklights: Radioactive Yellow is our brightest HyperSpring ever, and glows brilliantly under blacklights: It can even be worn as a stylish bracelet! Take it everywhere and practice until you're a master! (Fits best if the widest part of your hand, when laid flat on a table, is 4.5 inches [11 cm] or greater.) Don't forget to add the FREE Fundamentals of HyperSpring Video Course to your cart so you can make the most of your HyperSpring! Diameter: 8.7 cm (3.4 in), Height: 10 cm (3.9 in) Weight: 5.3 oz
