A rebuildable dripper atomiser is an open deck that allows the vaper to build a coil or install a premade coil. An RDA 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 RDA, feel free to message us on Facebook or shoot us an email at firstname.lastname@example.org.