Using the wax seal of your choice in either: Hogwarts School, Hufflepuff, Gryffindor, Slytherin, Ravenclaw. Hufflepuff House - 393476339320. Slytherin House - 393476316435. Both the above can be personalised with either Slytherin, Gryffindor, Hufflepuff, Ravenclaw or Hogwarts wax seals.
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