Brand: NITRA Item: Exhaust silencer Connection: 3/4in male NPT Material: Aluminum Working Fluid: Air or inert gas Maximum Operating Pressure: 250 psi (17 bar) Flow Coefficient: 13.5 Exhaust Silencer Type: Cylindrical NITRA pneumatic exhaust silencer, aluminum, cylindrical, Cv=13.5, 3/4in male NPT.