Wow great product.
GT Cores are specially designed to fit into the NRG tank series.
It comes in traditional cotton and signature CCELL Ceramic in different resistances, from GT 2 all the way up to GT 8.
Gear Up with GT Cores as you desire!
These coils last a good week for a heavy vaper, they do burn out though if your juice has a lot of artificial sweeteners, and we all hate a dry hit! 5/5 for brand name quality.