Toilet seat hinges
thingiverse
Here is a simple design that represents a hinge for the toilet seat, the lid and the ceramic. This is a universal approach and you may need to make further adjustments.
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With this file you will be able to print Toilet seat hinges 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 Toilet seat hinges.