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18mm Glass Stems

18mm Glass Stems

18mm glass bong downstems effectively have two of the same sized joints, although one is a 18mm male and this is the part that is inserted in to the water pipe and the other is a 18mm female and this is where your accessories such as a cone piece or ash-catcher etc. are inserted.18mm, 18.8mm SG18 and SG19 are all the same size and can be referred to by any of these names.

If you need help selecting the correct length please view our "Downstem Measuring Guidehere.