Foot for Cat Litter box

I built a custom cat litter box and I had some height restrictions for the total build. So, I designed those feet to meet those requirements. 

The foot is 8cm tall and takes three 4mm screws with countersunk heads.

I printed them in PLA and spray painted them black after a light sanding. The 20% infill might be a lot, but I wanted to be on the safe side, as my cats likes to jump on the litter box..