LEGO DUPLO to BRIO Wooden Rail
thingiverse
Slightly smaller inside supports, I found they fit DUPLO blocks much better.
Download Model from thingiverse
With this file you will be able to print LEGO DUPLO to BRIO Wooden Rail with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on LEGO DUPLO to BRIO Wooden Rail.