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852131 Mr. Freeze Key Chain is a key chain released in 2007. The set features the Mr. Freeze minifigure attached to a key chain, as well as the LEGO logo printed on a white 2x2 (2x3 top-rounded w/ hole) tile. As with all key chains, the minifigure parts can move, but can not come apart, because a special glue is used to fix them in place.
- The item number of the set is 4520512.