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GuoGuan yuexiao EDM 3×3 is the Updated version of GuoGuan Series. EDM comes with a magnetic version which allows you to change the strength of the magnets without the need for spare parts. EDM includes the unique magnet module which could be taken of or switched with different modules.the whole new design allows to adjust magnetic strength without assembling. swith freely between strong and week magnets to achieve a feel of either stable or fast. its a light weighted cube even its magnetic.