The Oduman N2 Glass Hookah includes a built-in stem diffuser to help quiet down the bubble effect when smoking. The built-in hookah diffuser also helps enable a smoother session for more enjoyable flavour. The glass designed for the Oduman N2 gold edition is the thickest in volume known to-date within the hookah industry to prevent any fractures or cracks. The weight of the hookah is 3.5 KG in total which says something massive about the quality design of this beautiful glass and limited edition hookah.