I designed this keycap to have a smaller footprint than other conventional keycaps, so that the beautiful switch plate on the macropad I designed it for can still be seen.

I used Black LED Acrylic for the lasercut top and glued it on top of the 3D printed body. I don't guarantee the stem fit since I'v eonly ever tried them with one set of switches, but I'm including the .f3d file here in case you'd like to adjust the model yourself, add a different window cutout, etc. It is a parameterized design so feel free to customize.