18mm Bong Stem

18mm stem to fit an 18mm cone. took me a few times to get the taper right so hopefully it fits. also i made these a few years ago so i couldn't remember which file was the final version bit i believe its "stem dia 2".

note: there are two standard size tapers 14mm and 18mm so this could be scaled down to work for a 14mm

could also be used as science equipment potentially as the sizes and tapers are similar i believe.
NOT FOR EDUCATIONAL PURPOSES
everyone has the right to D/L and use the files