so i aquired an oldschool heavy glass bong that came with an 18mm glass diffy downstem but is not glass on glass it need a rubber grommet but i cant find a good 1 at hardware store can anyone post a link of what to get
this may sound stupid but for now wrap a hair band around the downstem to whatever thickness you need
Could you use a .5" grommet from a regular grommet bong? I made a waterfall bong from a vodka bottle with a GonG downstem, I just lubed it up good and jammed it through the grommet