The Exxus EX4 Oil Cartridge by Exxus Vape is sleekness, portability, and power combined into a single component. Although this tank is petite in size, it still offers users with impressive draws and smooth vapor. This result is achieved via the piece's glass encased stainless steel core. The vaporization chamber presents an idyllic environment for tempering e-liquids or essential oils. The attachment component has 510 threading which make the EX4 a simple additive.