I have no idea on this one. My fiance bought it for me at a garage sale...all it says is made in China. Regardless of what it is I really think it makes for a great prop...I am going to make some kind of water/lava/nuclear waste looking things to put in the empty holes when it is laid flat.
I am also putting up a few pics of this in the collection pics section with my Monster in My Pocket figures displayed on it...I think it looks epic.