4 mm inner dia

thingiverse

This is a customized version of http://www.thingiverse.com/thing:44078, Created with Customizer! Using the following options: High-Three equals four High-Two equals eight High-One equals thirty Dnut equals six D-three equals three point five D-two equals five D-one equals twenty Hnut equals two point seven Slices equals thirty-six Bravo equals four Nu equals twenty