The Nautilus BVC coils 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 1.8ohm NS is specifically designed for nicotine and salt. Nautilus Mesh Coils 0.7ohm uses stainless steel mesh to create better flavor and vapor production. Compatible with the Nautilus Tank, Nautilus Mini Tank, Nautilus 2 Tank, Nautilus 2s Tank, Nautilus AIO, and Aspire Mulus.