I also use a Matrix 5ml. Because of the 5ml capacity I really prefer this tank during longer drives. Product Features: Rectangular Coil Design for Maximum Airflow 0.2 ohm Matrix Coil – 30w to 80w 0.6 ohm Matrix Coil – 30w to 80w Incredible Vapor and Flavor Production Stainless Steel widebore Drip Tip with 6.5 mm wide auxiliary airflow 5 milliliter capacity Stainless Steel Construction Pyrex Tank 22mm in Diameter