Simple enough, this is a keycap for use on a Romer-G keyboard (most all mechanical Logitech keyboards, such as G910, G610, etc.). Something to note is that this is a good bit shorter than some of the top keycaps if that'll bug you. Also in my print I had oriented the logo upside down so the key is slanted in a different direction than the others, but that's fixed in the file uploaded.