User Summary: The Stone Floor Pack is part of the City Builder System. The Stone Floor Pack is made of "Dwarvenite". The Stone Floor Pack was initially available as Add-On item during the City Builder System Kickstarter. The item comes in both painted and unpainted versions. The Stone Floor Pack comes with these 10 pieces: (2) Floor, Stone, Solid 4x4 (2) Floor, Stone, Stairwell 4x4 (2) Floor, Stone, Trap Door 4x4 (2) Ladder (2) Stair, Steep