18mm to 14mm Female Glycerin Downstem

You can convert that old 18mm female pipe joint rig or bong into a handier 14mm female pipe joint, and you can also cool down your rips simultaneously! This glycerin-cooling downstem slides into an 18mm Female joint and converts it into a 14mm female joint. Keep this glycerin downstem in the freezer until you are ready to use it, and no need to worry, the glycerin stays liquid when frozen so it won't crack the piece. We only stock these in 18mm Male to 14mm female. Super solid construction!