The Eleaf EC Coils are for the Eleaf Melo 1, 2 & 3, ELeaf iJust 2 and can also be used with the Aspire Triton atomizers. These Eleaf EC Coils are very popular because of their quality design and price. The Eleaf EC coils feature larger wicking holes for better wicking and a heating wire of 0.4 mm in diameter to create large amounts of vapor and flavor production, moreover, the Eleaf EC Coils uses 100% organic cotton for a pure flavor.