Downstem

18mm/14mm Flush Mount Glass on Glass Downstem DiffuserThe replacement glass on glass downstem diffusers are made with high quality glass ground joints. Each downstem is diffused with several slits at the bottom of the stem. Available in several lengths...

A Down Stem is a piece of scientific glass that connects a tube-style water pipe to its slide bowl. It's easy to break and can get quite dirty so people like to have replacement options.This particular down stem has a 14mm male fitting and 14mm female...