Dias Platform Pack is part of the Dungeon of Doom series. It is made of "Dwarvenite." This item was initially available as an add-on pack during the Dungeon of Doom Kickstarter. The item comes in two painted versions (standard red marble and the limited edition white marble) and an unpainted versions.
Dias Platform Pack comes with these 12 pieces:
(8) Dais Platform
(2) Dais 2x1 Platform
(2) Stair Jack