Eleaf HW1 (Single) Coils 0.2 Ohm 40 - 80w best 50-65w

Eleaf HW2 (Dual) Coils 0.2 Ohm 30 - 70w best 45-60w

Eleaf HW3 (Triple) Coils 0.2 Ohm 50-130w best 70 -90w

Eleaf HW4 (Quad) Coils 0.3 Ohm 40 -110w best 75- 80w