The best coils Ive found is off wotofo.com. they r 28×2+38 nichrome fused claptons 7 wrap on a 3mm. They ohm out at .31 for a pair. I can get 2 extra wraps off them and make a 9 wrap that ohms out at .42. They give off great flavor and amazing flavor. They now sell it in rolls of 20 foot wire.