The build deck supports a single coil build and can be replaced by unscrewing two philips head screws. The build deck measures roughly 9mm by 5mm which makes this RDA perfect for simple round wire builds. Also features a 3mm by 2mm bottom mounted airflow which makes direct contact to the coil providing smooth and pure flavour. The adjustable airflow control is located at the at the base of the RBA and can be fully closed off if needed. Refilling the tank is a simple task utilizing the provided removable silicone plug located at the top of the RBA.