GeekVape Z Coils feature high-quality kanthal and mesh wires. There are four coil resistances to choose from 0.25ohm, 0.15ohm, 0.4ohm, and 0.2ohm, giving you a direct-to-lung (DTL) vaping experience. These coils are designed for optimal vaping and coil life. They come in a pack of 5 and work with most GeekVape vape kits and vape tanks.