Simple to print Window Opener / Window Stopper to keep your windows open by putting it into the angle between the frame and the window sash:

Works super quick and secure for windows and e.g. balcony doors as shown here:

The groves in the longer sides interlock self adjusting with the frame and hold the part in place to the frame even if the window or door sash moves.

Printing instructions 

• 0.2 speed profile

• No brim 

• Supports from the print bed were set active but might not be needed

• Optional fuzzy skin

• Note: Can be printed on the flat sides as well without any problems 

Happy printing =)