This is a remake from @MauroC_2535386 original design to include 2x20mm conduit. see his page for original.
Printing tips with 0.4mm nozzle:
1_ 0 top 0 bottoms,
2_ 0% infill ,
3_ 5 loops,
4_ 0.6 mm line width,
5_ 0.3mm layer height
The author remixed this model.
2x20mm conduit