ZOB Glass Downstems are replacement downstems for your ZOB bong. These glass downstems are an original replacement. ZOB downstems fit most standard bongs, bubblers, and water pipes requiring a 14/18mm fitting.  The 14/18mm diffused downstems feature quality boro glass and several diffusion slits for added airflow and superior water filtration. 

Downstem Features:

• 14/18mm diffused downstem
• Bong joint fitting: 18mm
• Slide joint fitting: 14mm
• Borosilicate glass
• Multi-slit diffused perc
• Available in different lengths 
• Sandblasted ZOB logo

Note: All downstems are measured from the top of the ground joint to the end of the diffusion tip. Please see our diagram in the listing for complete downstem measuring instructions. 

Added September 25, 2020