Drum-Top Vacuum Head Vacuum Power Source Pneumatic Number of Power Heads 1 Vacuum Pickup Type Wet/Dry Vacuum Filtration Type HEPA For Drum Capacity 20 gal Vacuum Air Flow 61 cfm Static Pressure 105 in Sound Level 96 dB Vacuum Hose Dia 1 1/2 in Vacuum Hose Length 20 ft Minimum Air Compressor 4.4 hp Inlet Air Flow 20 cfm Inlet Air Pressure 100 psi Inlet Connection Gender Female Air Inlet 1/2 in FNPT Inlet Connection Type Threaded Standards OSHA