1. Unique design with three separate sources for airflows; 2. Air slots in front of coil,with AFC; 3. Air holes through negative posts to bring air to back side of coil; 4. Rebuildable dripping atomizer,with 2 vent holes on the body; 5. 3 silver posts for single and double coil; 6. Laser and engraved patern logo; 7. Derlin insulator at drip tip(Also serves as AFC for top air holes); 8. Fit most of the 510 drip tips and 510 thread ecigs.