The Aspire Athos Replacement Coil are replacement coils to be used for the Athos Sub-Ohm Tank. The replacement coils come in three types: A1 Single coil- .16 ohm, rated at 85 to 100w, A3 Triple-Coil 0.3 ohm, rated for 60 to 75W and A5 Penta-Coil 0.16 ohm