These are add-on pieces to convert a mini 4x4x4 (46mm) cube into a megamorphix. The 4x4x4 required can be bought
here, but it must be truncated and carefully tensioned as described on the TwistyPuzzles forums
here These pieces can then be glued on to shape change the cube into a tetrahedron. The stickers can either be hand cut using the template provided or bought from Oliver's Stickers
here