Vaporesso GTM CoilsThe Vaporesso GTM Coils feature a plug-and-pull core function designed exclusively for the Vaporesso Cascade Sub-Ohm tank. An industry first in Isolation Structure Design, the GTM coils come in two varieties; the GTM2 coils are rated at 0.4ohm resistance, and the GTM8 coils at 0.15ohm; and with the plug-and-pull action the user can switch performance levels to suit their vaping needs without having to maintain a second tank.. GTM 2 :0.4 OhmClapton Style40 to 80W55 to 65W Recommended Range GTM 8 :0.15 ohmQuadruple Vertical CoilsClapton Style50 to 110W60 to 80W Recommended Range