Pneumatic Exhaust Muffler 1/2 in Air Inlet Size 1/2 in Air Inlet Type NPT Maximum Flow Rate 57 scfm Filter Element Material Bronze Maximum Operating Pressure 300 psi Minimum Operating Temperature 35 Degrees F Maximum Operating Temperature 300 Degrees F Filter Rating 40 micron Fitting Material Steel Air Outlet Size 1/2 in Air Outlet Type NPT Body Material Bronze For Fluid Type Exhaust Air Material Filtered Air Gasoline Oil Minimum Flow Rate 0 scfm Outside Diameter 1 7/8 in