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This is a cubic transformation of a pyraminx crystal. 57 millimetres to an edge. This puzzle requires 12 M3 x15 screws. Stickers are available at http://oliverstickers.com/stickers-for-shapeways-puzzles/callum-moseley/callum-s-hexaminx-crystal.html
Note: This model is no longer available in dyed materials, because the hollow pieces have a problem with the dye.