Crown V1 the OG. There is a reason that coils for the OG are still widely available, very few tanks that are as old as the Uwell Crown still make coils and are sold by vendors everywhere. They got it right the first time, also it doesn’t leak and vapes quite nicely in TC. Other than that Freemax fireluke coils that are sold in the five pack have a ss316 option. I believe they ohm at 0.16 and can be used in the freemax tank but also the Voopoo Uforce T1 and T2 tanks as well as a couple other tanks.