The Exxus EX2 Oil Cartridge by Exxus Vape is the first generation of the EX lineup of cartridges. This petite device captures all of the qualities that ensure a product is a powerhouse performer. The EX2 has a male designed, 510 thread attachment element. This count is the standard threading for EXXUS batteries which this cartridge is intended to be paired with. The high-quality materials used to craft each component of this tank are durable and able to carry the device session to session.