PTFE slicer
thingiverse
Well it splits teflon tube into two like cut in half. Other than making clean slices you probably don't need this.
Download Model from thingiverse
With this file you will be able to print PTFE slicer 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 PTFE slicer.