Dominoes are very popular entertainment games products all over the world. In different areas people might play the games in different ways with different dominoes. Compare with Double-6 dominoes, the Double-9 dominoes isn't so common but still many guys need it in their place.
Here we offer the double 9 marked dominoes as well as double 6 and double 12 ones in metal box pack. With the invisible ink marked dominoes, you can wear any luminous ink reader like infrared glasses or contact lenses to see the invisible ink marks well. The marks can be points the same as that in the face or be numbers instead. However, people can't see any marks with naked eyes on the marked dominoes.
You can just buy our double 9 marked dominoes directly or send us your own ones to mark with invisible ink for you.