In the heat,lighter fluid can evaporate quickly. This gasket will greatly reduce fuel loss due to evaporation and save fluid  FUNCTION: 1.Lighter rubber gasket make fluid last 3X longer,reducing loss of fluid from evaporation The Universal lighter Rubber bottom contains standby flint slot, oil injection hole and flints hole. Thoughtful design with extra flint storage.Potable and convenient. SIZE: Lighter rubber case size is 1.42*0.45inch, fit well for most kerosene fluid lighters  Does not work on the "slim" variant. MATERIAL: Made of high quality rubber material have months service life Quantity: Various packaging quantity options：4pcs ,6pcs,18pcs Gift: Filter as showed in photo for each order