This is the Eleaf HW-M2 replacement coil head for the Ello series of vapes. It features a new, innovative leak-proof design and self-cleaning (LPSC) technology. It offers better airflow and uses a more porous cotton. It absorbs e-liquid faster and more efficiently, and delivers top-notch vapor. They perform best between 60-70 watts. The coil head is designed for 0.2ohm and the pack contains 5pcs.