Uwell Nunchaku Replacement Coil is designed for the Nunchaku Tank, There are Uwell Claptonized A1 coils 0.25ohm and Claptonized A1 coils 0.4ohm available.
The Claptonized A1 0.25ohm coil is recommended for the wattage 40-50W
The Claptonized A1 coil 0.4ohm is recommended for the wattage 45-55W.
The UN2 Meshed-H 0.2ohm is recommended for the wattage 50-60W
designed for large cloud vaping at low wattage