The GS Air S 1.6ohm Head adopts the SS316L material as its wire, it presents better MTL vaping and great flavor. It is also a new atomizer head with dry-burn protection. It is compatible with GS Air cartridge. he GS-Air 2 replacement coils are custom designed for the Eleaf GS Air 2 tank. Each atomizer head is embedded with a single coil made of Kanthal wires, wrapped in parallel configuration, and wicked with 100% pure organic cotton.