The screen on one of my Tab 400 trailer windows would not stay up sometimes as the strings are not perfectly adjusted. I made this clip to hold the screen up when I don't want it to sag down, such as when I am towing the trailer. The clip just snaps on and can be easily removed with no damage. This one works on the front window of my Tab 400 and I don't know if it will work on the other windows in the 400 or other models of Tab trailers. I printed mine in PETG for some durability and resistance to temperatures. No supports needed and prints pretty fast. The round tab fits in the aluminum shade bar and the other end snaps to the plastic piece on top.