Small black piece came out of my window

This part looks like a kind of top sash guide, but I'm not sure what you have from these photos alone. It reminds me of our 18-032 but that's just an educated guess. In order to ID a match, I'll need you to remove an undamaged version of this part from the other side of the window (or an identical window in the house). Then, I'll need a photo of it from the front and side. Think of it like a mugshot.

The closest match that I could find is our 18-185. It unfortunately only comes in white. Look over our dimensions and see if it lines up.

The code on the insulted glass unfortunately does not help in window identification. You won't find any number on your window that tells you what the top sash guide is. The only way to do that is to go by its physical attributes.