Light switch button

I needed new caps for my light switch (Niko Hydro black serial switch with clamp). Only the button caps were not for sale, you have to buy the entire socket. So I measured the original buttons, designed them and 3D printed them.
Now I have 3D printed light switches in my 3D printing shed!
(I could spray paint them black, but I like that they are somewhat of an eyecather now in blue).