What wonderful people the magic guys are. They have made this pipe in a combination you can use either a 14.5 or an 18.8 downstem in this tube! Note though that it only comes with a 18.8 downstem and bowl combo. Tough Tough Tough those are the words to describe the Kombi. Two joints made from solid pieces of glass, tough rubber shock absorbers on the pipe and the bowl. No more broken dreams! Hallelujah!