It can hold 2ml (with PEI tube) or 2.5ml (with metal tube) e-juice capacity. In addition, it contains three tubes and three drip tips in the package. It is convenient for you to swap the air-tubes (inserts) without having to remove the coil and cotton. What's more, all the popular hole sizes are included in the package to fit your different needs of vaping (0.8, 1.0, 1.2, 1.4, 1.5, 1.6, 2.0, D-1). BSKR Mini V2 MTL RTA adopts 0.74ohm MTL Fused Clapton Coil. Just get it to enjoy real MTL vaping experience.