Downstems are available in 14mm, 18mm and also a combination of the two sizes or a 14/18mm downstem which allows you to place the stem within a 18mm sized joint fitting, but you can still enjoy your herb through a 14mm sized slide or bowl piece. Not only limited to glass, we also offer downstems in metal such as the Ace-Labz Titan-Stem adjustable length interchangeable unbreakable diffused downstems.
How to measure downstem? you locate the bottom of the joint then you measure from there all the way down to the bottom of the stem.
Make sure to always measure the downstem to ensure its going to fit your bong or you can get a universal downstem like the Titan-Stem which fits virtually all water pipes.Downs