Coil Description The Eleaf EC Coils fit various eLeaf Tanks including the iJust 2, the Pico, and the Melo 2. These come as a 0.5 ohm coil pack of five. The coil consists of two heating wires vertically placed in parallel. Which can handle up to 100Watts with the 0.5. The coils are 4mm in diameter, which can produce more vapor production for an enjoyable vape all day long. With 100% organic cotton wick for better flavor.