Crown 5 Mesh Coil is applicable to Crown 5 Tank. There are 3 types of mesh coil available: 0.23ohm single coil, 0. 3ohm dual coil and 0. 2ohm triple coil. The 0.23ohm single mesh coil(pre-installed) is best for 65-70W, giving you smoothest direct-to-lung vape and rich flavor. And the 0. 3ohm dual mesh coil(included) is best for 50-55W, suitable for a restricted direct-to-lung vape, providing warmer vapor and saturated flavor. And the 0. 2ohm triple mesh coil (sold separately) is best for 65-70W, bringing you slightly tight direct-to-lung vape, huge vapor and decent flavor.