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Bonza bongs and accessories


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Anyone out there using glass bonza bongs and accessories? I'm trying to design my own bong out of a glass bottle and need to know the size of the drill hole needs to be to fit bonza stems and grommets. So does anyone know off the top of your head what size hole it needs to be to snuggley fit the rubber grommet??.... or would someone mind getting out there bong and measuring it up for me... cheers
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Hi solidspace for a bonza sized grommet you would need the hole to be 22mm dia ;)

 

Cheers mate...hmmmm you sure about that? 22mm?? seems a little big for my guess. Bonza stems are 12mm right? then I would have guessed to add 3 or 4 mm for the grommet so that gives us 16mm... what u think

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