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Hollow Pyramid
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The concept of the Hollow Cube transferred to the Pyraminx but with a newly designed mechanism.

Hollow Pyramid was requested by Jet Xie. Knowing the Hollow Cube, he wondered whether it would be possible to design a hollow tetrahedral pyramid. The new puzzle uses the same square dovetail joint that holds together Hollow Cube. A pseudo-binary random sequency was used in the dovetail design to keeps the tips connected.

In 2019, Meffert's made a mass-produced version with white transparent body.

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