Discover a better fit for your unique bong with this 14mm Joint Downstem. This 3.5" downstem is designed to perfectly fit bongs with a slim 14mm joint, giving you improved stability and a superior, smoother smoke. Get the best out of your bong with this precise fit and enjoy a truly exquisite experience! This is not the standard size downstem. All of our bongs use a 18mm joint so if that is what you need these are the correct downstems. 14mm Joint Downstem Material: Borosilicate glass Size: 3." Joint size: 14mm