These essential Three Grommet Bundle is a pack of Base, Bowl and Hose Grommet. The Khalil Mamoon Base Rubber Grommet is used to replace a worn out rubber from your KM Hookah. It is a standard size for Khalil Mamoon and large bases.Hookah bowl grommets secure the hookah bowl to the top stem of your hookah and ensure a sturdy, air-tight seal. Hookah hose grommets go on the end of your hookah hose and fit in the hose adaptor of your hookah. These ensure an air-tight seal and also prevent the hookah hose from falling out while smoking.