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18mm vs 19mm Bong Joints: What’s the Real Difference?
If you’ve ever tried to buy a new bowl, banger, or downstem for your bong, you’ve probably run into a confusing question: Is my bong an 18mm or a 19mm joint? Some brands say 18mm, others say 19mm. Some even list 18.8mm. So what’s actually correct?
The short answer: They all refer to the same size.
It might seem strange that three different measurements can describe one standard joint size, but that’s exactly what happened as the smoking industry evolved. In the world of s
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Jan 12, 2026