Fits Ender 3 v2 natively on rear right rail or Ender 3 Pro on rear right rail if PSU is relocated.
I wanted to have sufficient storage for everything like tools, nozzles, etc and the Ender 3 Pro does not have any. I have seen many create storage under the bed much like the Ender 3 v2 but I have a Raspberry Pi mounted under it already.