Low-profile towel rack using a 1 inch OD PVC pipe.
Use the middle support for longer racks, omit for shorter racks
Screw holes are sized as clearance for #10 screws.
I needed a temporary towel rack for my bathroom for about a year before I remodel it, so I didn't want to spend any money on a towel rack. I did have PVC pipe and a 3D printer, so here we are.
The author hasn't provided the model origin yet.