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Product Description
<p><span style="font-size:medium">Here is a popular fractal, often called the </span><span style="font-size:16px">Sierpinski Tetrahedron</span><span style="font-size:medium">, because it is a three-dimensional generalization of the two-dimensional Sierpinski triangle. This is a "fifth-order" version, as there are five different sizes of octahedral holes.</span></p>
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