Fire polished clear downstems. These are measured fom the bottom of the downstem to the closest point of the sandblasted section where your downstem connects with your waterpipe.
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Downstems are glass accessories that draw smoke from the bowl into the water chamber of a water pipe. They come in various lengths and designs and may have a diffuser or percolator to filter and cool smoke. Downstems are easy to remove and clean, making them a convenient addition to a water pipe.