I forgot to bump,bought two of the nautilus nickel coils,look like they will go perfect with my beloved istick 40 watt tc,originally I was looking for a temp control tank that ran on nickel,if you have seen my posts around.then I decided not to buy one,and get non sub ohm tanks!this works out perfect,all I have to do is swap the coil,win,win!I got the notice it was shipped yesterday,will keep ya posted ! !