The Aspire Nautilus coil consist of a single Kanthal coil, situated vertically to enable the most intense levels of vapor and flavor. Organic cotton is used for maximum wicking. Nautilus 1.8Ω NS is specifically designed for nicotine and salt. Mesh Coils 0.7Ω uses stainless steel mesh to create better flavor and vapor production. Compatible with the K3 Tank, Nautilus Tank, Nautilus Mini Tank, Nautilus 2 Tank, Nautilus 2s Tank, Nautilus AIO, and Aspire Mulus.