The smoke has a bigger surface if it consists of little bubbles, which make it smoother and cooler. With those litte drilled holes at the diffusers tip, you can achieve right that. Of course it can be connected to every standardized 18/8 downtube.
Length from the core's upper edge: ca. 10cm
Tube diameter: ca. 10mm
Diffuser holes: drilled and melted
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