This is a SHP6720 Air Filter Unit. AIr control unit, computer no. 6720. One 18C-3R regulator with 160 lb. inverted gauge (Ga-a600) & air cock (1-HC-1885) Additional regulated outlet included. Filtered main line outlet included. Air inlet: 1/2" F.P.T. Filter capacity: 120 CFM, Regulator capacity: 50CFM.