Microsoft Surface pen cap

thingiverse

I tried using the Sharpie cap suggested on Reddit, but it was awkward and didn't fit well. It extended past the edge of the Surface Pro 4 pen every time. This pen cap fits perfectly to the pen and the tablet, matching the blocky design of the pen itself. I verified that the .stl file has a ring with Meshmixer. The Thingiverse model shows an insert that goes all the way down, but it's actually a ring in 3D form.