Use the Black Leaf diffuser plug to connect freely chosen 14/5er bongs with 14/5 downtubes. The little holes of the diffuser divide the smoke in uncountable small bubbles, which have a really big surface. And so the smoke becomes softer and cooler.
Length from the core's upper edge: ca. 15cm
Tube diameter: ca. 10mm
Diffuser holes: Drilled and melted
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