The Airis 8 wax vape pen is a revolutionary new design allowing you to vape through a conventional touch coil or by using a dipper coil. Both coils will yield the same results. If you purchased an Airis 8 Wax pen it will include one of each type of coil. Coils produce an extreme amount of heat quickly to vaporize your concentrate. Because of this all coils are prone to burning out overtime. We feel it is extremely important to purchase genuine OEM coils. Genuine Airis 8 Wax Replacement Coils will have a tighter fit in your battery and will provide you extended longevity.