User Summary: The Doors and Windows Set is part of the City Builder System. The Doors and Windows Set is made of "Dwarvenite" and has some metal parts. The Doors and Windows Set was initially available as Add-On item during the City Builder System Kickstarter. The item comes in both painted and unpainted versions. The Doors and Windows Set comes with these 14 pieces: (4) Corner Post, Stone (4) Corner Post, Tudor (1) Door, Noble's, Tudor Wall (1) Door, Ramshackle, Stone Wall (1) Door, Ramshackle, Tudor Wall (1) Door, Studded, Stone Wall (1) Wall, Stone, Offset Window (1) Wall, Tudor, Offset Window