This is a simple Sponge holder. The one part, the Sponge Holder you can print it as it is. doesn`t matter what settings you will put.
I suggest :
Layer Height 0.28mm
Retraction for PLA 5.2mm
For the second part, the Holder for the case, Print it as the picture. The lower the layer height the better. If you put Big layer Height you will need support.
Layer Height 0.16mm
When you have printed both parts. there is a connection with two pins that i designed and two holes. you attache them and i suggest a glue to be sure.
Be free to change what ever you like.