The iClear 30 features dual coils, an easily replaceable atomizer head, a large 3ML capacity, and rotatable mouth piece. Replaceable Dual Coil: Innokin iClear 30 is the first dual coil clearomizer with a replaceable atomizer head, making it very inexpensive to maintain, while providing huge amounts of vapor and flavor. Huge Capacity: Another great feature of the iClear 30 is the large 3ml chamber for holding e-liquid. This means vapers can vape longer between fills, uninterrupted. Rotatable Mouth Piece: The iClear 30 utilizes a rotatable mouth piece with an innovative 360 degree rotating design. These mouth pieces are designed to swivel around, providing a more comfortable and enjoyable vape!