The Hcigar Fodi F2 RDTA features a dual-post, single coil build deck. And it comes with 22mm diameter and 2ml e-juice capcaity. Due to the style and layout of the build deck, the F2 is designed to be built with a single horizontal coil, with the wicking elements flowing organically into the dual 4mm diameter wicking holes located opposite of on another on the deck. Airflow enters the build chamber from the deck through five 0.8mm diameter airholes located on each side of the deck and is redirected into a centrally located airhole in the center of the build deck.