Tips: The Innokin iClear 30 Dual Coil Clearomizer has a large capacity, 16 wicking threads and 360 degree rotatable mouthpiece! more wicking and more comfort means more vaping pleasure! And, with replaceable coil heads, more money saved! These atomizers have the popular 510/Ego threading so they are compatable with many batteries on the market today. Dual coils & 16 wicks give this clearomizer an oustanding throat hit, greater performance. They are strong and sturdy, with a stainless steel band around the base and screw top mouthpiece. These are low resistance and have a large capacity. Filling is easy. Just unscrew the mouthpiece and fill up the tank. Replacing coil heads is a snap too. Simply take off the old one and screw on another. Utilizes the popular 510/Ego threading.