simple 1.75mm filament filter sponge holder to put on top of a PFTE tube

Very simple sponge holder to put on top of an PFTE tube.
12mm diameter , 20mm high with 4mm hole in an 1mm thick bottom.

the V2_simple 1.75mm filament filter sponge holder.stl is the same but with a little cam on the bottom hole to enable guiding the PFTE tube better in the hole on the bottom