This is a remix from the Bear Lab provided STEP file modified for the 42.3mm 60° chamfered extruder PTFE for the MK3S+. You can find the Bear Lab writeup here at https://guides.bear-lab.com/Guide/Trim+PTFE+Tube/21 and original STEP and STLs here https://www.thingiverse.com/thing:3749528
I used PETG, but PLA is fine, 0.4mm nozzle, 0.2mm layer height, 15% infill, no supports, about an hour to print.
Edit: PTFE tubing should have an I.D. to snugly fit a #49 (0.073" or 1.85mm) drill bit for best MMU2S filament tips.
The author remixed this model.