The 510 center pin is Type II D hardness gold over c360 brass and sealed from the deck. The drip tip adapter is Ultem. All other parts are stainless or gold over stainless. 22mm OD. Height is 16.5mm or .645 Dual & Single airflow capable. Airflow is 3.2mm equivalent Max, each slot. Overbuilt deck w/ square PEEK isolator. The deck is designed around common vertical & horizontal builds. Chamber size is approx. 17.5mm ID by 8mm tall. Therere some little tricks too like the AFC can be set in its widest position to both laminar and turbulent airflow.