Why hasn't anyone thought of this before? That is what you will ask yourself when using this innovative hookah purge valve. This silicone purge valve will fit glass hookahs as well as traditional hookahs such as Khalil Mamoon. The all-in-one design means that you never have to loose your ball bearing again. Simply snap this purge valve on any hookah and you are ready to go. The AOT purge valve includes a glass bearing inside of it meaning it will never be lost or rust.