Air Amplifier, Amplification Ratio 25, Inlet Size 1/2 in, Air Inlet Type NPT, Inlet Diameter 4 15/16 in, Discharge Dia. 4 in, Maximum Sound Level 73 dBA, Body Material Aluminum, Air Consumption 29.2 scfm, Air Output Volume @ 80 psi 730 scfm, Output Type High Efficiency Fixed, Includes Filter Separator Not Applicable, Includes Pressure Regulator Not Applicable, Includes Shims Not Applicable, Mounting Hole Diameter 1/2 in, Number of Mounting Holes 2, System of Measurement Inch