Windows
Purple Drapes, Full Bottom
A cloth block with 5 hit points.
Crafting
Craft at Backpack · makes 1
Crafted as 
Curtains and Drapes: pick this one of its variants when you place it.
Cloth Fragment× 5
Iron× 5
Drops when destroyed
- Cloth Fragment× 1-3
Where to find (3 POIs)
Mo Power Electronics (tier 2), Clean & Cozy Corner, The Leonard Residence.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.