Tilt window stopper

I was getting increasingly annoyed, that our tilt windows kept slamming shut, as soon as the weather is a bit windy - making it very difficult to vent or create a draught through our appartment. Most options require drilling or adhering things into the windowsill, which might not be the best solution for rentals. This little piece is easy to slide in between the window and windowsill, and works great so far Just shy of 20grams, takes about 30 minutes on P1S