The window comes either pre-assembled (as 1 file) or you can print the frame and inner parts seperate.
The window is based on the brick window 30044 frame and 29170, 30046 or 37411 lattice.
Perfect for crafting for wargming terrain. The size of the window is 16x25.6x8mm
Second picture is a crafted Mordheim terrain piece, inspired from Leif @ https://www.youtube.com/@DevsDice - go check him out!