Drum-Top Vacuum Head Vacuum Power Source Pneumatic Number of Power Heads 2 Vacuum Pickup Type Wet/Dry Vacuum Filtration Type HEPA For Drum Capacity 55 gal Vacuum Air Flow 163 cfm Static Pressure 163 in Sound Level 102 dB Vacuum Hose Dia 2 in Vacuum Hose Length 20 ft Minimum Air Compressor 24 hp Inlet Air Flow 110 cfm Inlet Air Pressure 100 psi Inlet Connection Gender Female Air Inlet 3/4 in FNPT Inlet Connection Type Threaded