1:6 French Window Warehouse Walls Kit (To Fit the 650mm Wide Roombox Kit 16DSRB)
The kit contains a back window wall and side window wall
This fits room box part number 16DSRB, where the room box is collapsible for storage and the walls stay together using magnets.
The walls can be reversed to give many combinations of decorations, the photos show some.
Note: Photo shows example, kit is raw.