Pencil Cap
thingiverse
Make sure you print this with vase mode/spiralize mode! By the way, this should work on all pencil brands besides America's Pencil.
Download Model from thingiverse
With this file you will be able to print Pencil Cap 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 Pencil Cap.