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Zob Glass 14/18mm Diffused Bong Downstems

$24.00 $24.00 $24.00
In stock

Upgrade your smoking experience with Zob Glass Downstems, the perfect replacement for your Zob Glass bong. These original glass bong downstems are designed to fit most standard bongs, bubblers, and water pipes, requiring a 14/18mm fitting. Crafted from high-quality borosilicate glass, Zob Glass downstems feature multiple diffusion slits, ensuring enhanced airflow and superior water filtration for smoother hits.

Downstem Features:

  • 14/18mm Diffused Downstem: Ensures compatibility with most standard bongs and water pipes.
  • Bong Joint Fitting: 18mm, perfect for secure attachment.
  • Slide Joint Fitting: 14mm, ideal for various slide attachments.
  • Borosilicate Glass: Durable and heat-resistant for long-lasting use.
  • Multi-Slit Diffused Perc: Provides superior diffusion and filtration for smoother, cleaner hits.
  • Available in Different Lengths: Choose the perfect length for your bong or water pipe.
  • Sandblasted ZOB Logo: Adds a touch of authenticity and style.

Whether replacing a broken downstem or upgrading your current setup, Zob Glass Downstems are the ideal choice for improving your smoking experience. Enjoy the perfect combination of quality, functionality, and style with these expertly crafted downstems.

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. 

Browse the entire ZOB Glass collection here. 

Added September 25, 2020

Measure twice. Order once.

Choose the Correct Downstem Fit

A brand name alone does not guarantee compatibility. Match the bong joint, bowl joint, and measured length before adding this downstem to your bag.

How to measure a bong downstem from the top lip of the ground joint to the end of the downstem

How to measure

Measure From the Top Lip

  1. Remove your current downstem from the bong.
  2. Measure from the top lip of the ground joint to the very end of the downstem.
  3. Choose the matching length option above. The tip or diffuser openings should sit underwater without touching the chamber.
Do not measure the full glass from its highest point. The usable length starts at the top lip of the ground joint.

Product specifications

Fit and Function

Brand
Zob Glass
Available lengths
3.75 inches, 4 inches, 4.5 inches, 5 inches, 5.5 inches, 5.75 inches, 6 inches, 6.25 inches, 6.5 inches, 6.75 inches
Material
Borosilicate glass
Diffusion
Diffused
Joint configuration
14mm bowl / 18mm bong joint
Made in
United States

Compatibility checklist

Check All Three Measurements

1

Bong Joint

The outer joint on the downstem must match the ground joint on your bong.

2

Bowl Joint

The inside opening must match your bowl. A 14/18mm downstem takes a 14mm bowl and fits an 18mm bong joint.

3

Usable Length

The diffuser must reach below the waterline while clearing the bottom and side of the chamber.

Complete your setup

Downstem Fit Questions

How do I measure this replacement downstem?

Measure from the top lip of the ground joint to the end of the downstem, then select the matching length variant.

What does 14/18mm mean?

The 14mm opening accepts a 14mm bowl, while the 18mm outer joint fits an 18mm bong joint.

Will this fit any bong from the same brand?

No. Models from the same brand can use different joint sizes and lengths. Confirm all three measurements.

How far should the downstem sit in water?

The tip or diffuser openings should sit below the waterline without touching the chamber wall or bottom.