Simple and robust towel rack

Need a strong and quick to make towel rack? Just print this model and get yourself a round bar or tube. Within 5 minutes you will have a cheap but sturdy and modern looking towel rack. The round bar can be made of aluminium like in the picture, but obviously you can use a wooden or plastic round bar if you prefere. There are versions for different diameters: 10mm, 12mm, 14mm, 15mm, 16mm and 18mm. Use four screws (3mm or 3,5mm diameter) to mount the rack to a wall or sideboard. 

The three internal holes are only for additional strength. No screws needed here.