Alliance Fat Boy RDA is designed in 46mm deck. The RDA is fully constructed from 304 stainless steel. Adjustable airflow control with multiple airflow control sleeves. The RDA is with 2/3/4 convertible negative post and 1/2/4 hole positive interchangeable negative post design. The postholes is large up to 3~4mm diameter. The RDA kit comes with 22mm chuff cap and 510 drip tip adapter for 510 drip tip.