Joint size?

Discussion in 'Smoking Accessories Q&A' started by Smokeitall420, Apr 10, 2016.

  1. I'm getting a new male nail head for my bong to make it into a rig, I need help to see what mm size it is , thank you!

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  2. An easy trick is to get a AA battery. AA's are 14.5mm If it slightly fits/matches up, then it's 14.4. If it's much bigger, then it's 18.8

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