Speed Control Muffler 1/4 in Air Inlet Size 1/4 in Air Inlet Type NPT Hex Size 9/16 in Maximum Operating Pressure 300 psi Minimum Operating Temperature 35 Degrees F Maximum Operating Temperature 300 Degrees F Filter Rating 40 micron Air Outlet Size 1/4 in Air Outlet Type NPT Body Material Bronze For Fluid Type Exhaust Air Material Filtered Air