These keycaps are clones of DCS style 4 row keycaps.

Each row type has a marking in the bottom making it easier to see which one it is (see photos).

In prusa slicer I recommend turning on seam position to the rear (under layers and perimeters)  when making a bunch of these keys. To me it looks more tidy than random seam breaks around the keys.

For the top of the key turning on Archimedean Chords on bottom fill pattern looks nice. I've noticed with this setting on though there are gaps sometimes,  adding small steps of .05 to Extrusion multiplier (under filament settings) normally fixes the problem.

Keycap works with standard MX stems and Kalih BOX.

I printed mine with PETG as it sticks better to the print bed and imagine it would hold up better than PLA for typing. 

Filaments in photos is Hatchbox Dark Green PETG & Paramount 3D Stealth Gray PETG.