Trixie Protective Grille for Windows (Side Piece)

I needed this protection for the bedroom so I could leave a window tilted open at night. The windows are set deep into the wall, so there's no need for protection at the sides or top. Unfortunately, not even the wide ends of the protector fit between my windows (they're very close together). And they're too thick to install under the closed window. Sticking them on wouldn't work either, as it would be too unstable—only the bottom rail has a narrowing, so it carries all the weight.

Can't be stuck on, only screws are included in the package. For the price, they could have added some adhesive pads as well.