The hookah ball bearings are a small but essential part of the hookah smoking experience. The air release valve on most hookahs is fitted with a hookah ball bearing. When the hookah is not in use, the ball bearing sits snugly in the valve, preventing air from entering the hookah and keeping the shisha flavor fresh. When it's time to smoke, the hookah ball bearing is removed from the valve, allowing air to enter the hookah and clearing any stale smoke out of the vase. Hookah ball bearings are small, but they play a big role in providing hookah smokers with a smooth, flavorful smoking experience.