A rebuildable tank atomiser contains a standard RDA build deck, with the tank like a clearomiser. The deck contains a positive post and a negative post. A coil needs to be in both posts in order for it to fire up. Please make sure the bottom 510 firing pin protrudes from the connection. If you have any questions regarding your RTA, feel free to message us on Facebook or shoot us an email at info@momentumvapeco.com.au