The Apocalypse Mechlyfe style RDA is the updated to 25mm diameter. The 7mm build clamps with recessed screws allow you to fit any size coils you desire! 4mm juice well with 5mm Single or dual airflow holes gives you the ability to chase flavor or massive clouds. The 25mm Apocalypse Mechlyfe style RDA comes with bottom feeder (squonk) pin. This item is a replica of the original Apocalypse Mechlyfe RDA