YJ MGC 4×4 (Speed Micro-Bearing)
The magnetic YJ MGC 4×4 with one extra: small washers with ball bearings inside sit on top of the center pieces, which cuts friction and makes the turning faster.
Everything else is the MGC 4×4 that speedcubers already know: factory-installed magnets and a stable, stickerless body of about 60 mm that weighs about 115 g.
Worth knowing: 4×4 is a WCA event. The standard and UV coated MGC 4×4 are available as separate versions.



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