I printed this using PLA 3 walls and 20% infill and I'm pretty sure most other filaments work for this.

I used these keycaps https://www.printables.com/model/399607-complete-cherry-mx-stem-keycap-set-optimized-for-3 and these keycaps https://www.printables.com/model/1436066-omni-directional-cherry-mx-compatible-key-cap