Why do we choose a vertical coil design RBA? A vertical coil can reduce the atomizer’s chimney chamber and bring about the smoothest draw. A smaller chimney chamber can improve the flavor.

The Zen Boro RBA adopts a vertical coil design, a choice that is not merely aesthetic but highly functional. This design significantly reduces the atomizer’s chimney chamber, a crucial factor in achieving the smoothest draw possible.

Building tips:

First and foremost, it’s critical to keep the coil rod stationary throughout the entire setup to prevent the bottom of the coil from becoming obstructed. Ensure that the wicking material is packed firmly throughout, even in the areas behind the posts, to maintain a tight seal against any potential leaks. Aim for a wicking density similar to that of pre-built coils—secure, yet not overly constricted.

Secondly, matching the air pin size to the inner diameter of the coil contributes significantly to the draw’s smoothness. This small detail can enhance the vaping experience by providing a consistent and balanced airflow.

Lastly, when it comes to performance, spaced coils truly shine on this device, offering a markedly superior experience compared to contact coils, particularly in terms of airflow smoothness.





To better and more easily secure the coil and wicking, we have adopted a three-section design.

The Zen Boro RBA is compatible with Boro standard tanks. The airflow sizes available are 1.5mm, 2.0mm, 2.6mm, 3.2mm, and 4mm.




Side and bottom juice flow holes.

The kit includes 2 flat clapton Ni80 coils.