Cross compatible with the Smok Baby and Big Baby Beast aside from the NRG tank. The GT8 Parallel Quad Core 0.15 ohm coil is harnessing the power of 8 individual Kanthal coils to generate vapor like never before and giving the NRG tank an edge when it comes to massive cloud production. The powerful GT8 Replacement Coil is rated for best use between 50-110W, covering the mid-range part of the wattage spectrum for increased flavor, while supporting wattages that exceed 100W for the cloud chuckers out there that need more vapor. The GT8 Parallel Quad Core Coil Heads are wicked with Pure Organic Cotton and feature four large wicking ports for rapid-paced wicking.