Digiflavor Pilgrim GTA Tank comes with 25mm diameter and 4ml e-juice capacity. As a revolutionary GTA tank, it features interchangeable 510 or 810 drip tip, convenient top filling system and adjustable side airflow system. With big classic velocity style deck, the Pilgrim GTA is compatible with both single and dual coil to meet your different needs. All makes it to be the best choice for you.