Fused ConcentricubeA fused puzzle made of three 3x3x3s and stickered as an extended version of the Concentricube.
Fused CubesTwo 3x3x3's fused together to share a block of dimensions 2x2x2.
Fused Illusion CubeA pair of Fused 3x3x3 but with one cube modified to make it appear like a 2x2x2.
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