1) The window actuator (round steel part with square hole into which the window fits and allows the window to tilt in for cleaning.
2) Window guide. Spring loaded triangle that can be drawn in to allow the window to tilt into the room or released to hold the window in vertical position.
3) Window guide release. Plastic sliding release lever located on either side of the top of each lower window sash that connects to the window guide and allows you to pull the guide into the window frame to release the window out of the track.
Also included a pics of the window hardware for reference.
