the Catterpilar aka the grub
thingiverse
People tend to get either the measurement of a inch or a millimeter mixed up when referring to downloading something called "Grub".
Download Model from thingiverse
With this file you will be able to print the Catterpilar aka the grub 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 the Catterpilar aka the grub.