The FreeMax Fireluke Mesh Replacement Coil is designed to work with the FreeMax Fireluke M Tank. It also works with the Fireluke 2 tank that comes with the Twister 80W kit. Freemax Fireluke Mesh Coils Specs X1: Vertical single build. X2: Vertical dual mesh build. X3: Vertical triple mesh build. SS316L X1: Vertical single mesh build. The mesh design is a great choice for those who like to get them most of out their vape juices for flavor since it offers an even heating surface and lasts longer than a traditional coil. Mesh coils are a cost-effective alternative to the standard coil design and are perfect for those that are constantly replacing coils and getting muted flavor. WARNING: This is an advanced user item. Use at your own risk! Please ensure that proper precautions are taken when using such devices. Please read and make sure you understand the users manual before use.