This is a leading edge for the NANOWING designed by RedTwenty. Information on this assume wing can be found at http://red20rc.org/nanowing-600mm-kfm4-fpv-race-wing/
You need to print it with zero wall thickness (no walls) and 40% infill. I used Cura and selected grid for the infill pattern. You can play with the infill % for a lighter print if needed but I found 40% to be strong yet light enough for this wing. You will also need to print 8 of them.