The term ROOR down tube combined with Option Diffuser signifies a most innovative cooling technique.

Contrary to conventional down tubes, the opening of the tube’s end is first sealed and then pierced with small holes.

This means better distribution of the smoke as it rises in many small bubbles, which is the basis for its typical character.

The 29.2mm Diffuser is only available in one length for the Roor Zumo Bong.

Standard length for Roor Difusers

The 29.2mm Difuser is only available in one length for the Roor Zuno Bong