The FreeMax M PRO 2 Tank or also known as the MAXUS PRO Tank is an upgraded version of the FreeMax Mesh Pro Tank. The M PRO 2 features a 5mL capacity, innovative sliding top fill system, and utilizes FreeMax’s new FM CoilTech 4.0 Technology. Constructed from superior 304 Stainless Steel, the M PRO 2 Tank delivers delicious clouds from the new M Mesh Coils. In addition, the FreeMax M PRO 2 Tank utilizes 3 steel balls in the top filling cap which increases the friction needed to open the tank. This prevents the top fill cap from loosening in your pocket and prevents potential leaks. At the base is a dual slotted airflow control ring, allowing careful metered airflow to reach the center of the coil to create the best tasting flavors.