From the announcement:
We teamed up with Marc Gilbert from Dream Weaved Worlds to produce a new line of goods for your gaming tables. And as a result of our mutual cooperation we have a new release this week – a map tile set for miniature or RPG games. The set contains 12 different high quality tiles that depict a cavern system. That’s more than enough for countless possibilities to make a new environment for every encounter. But ‘countless’ is not a limit – we have more expansions coming soon. And we would really like to hear your thoughts and ideas to help us decide which set is going to be next.