Brand: NITRA Item: Exhaust silencer Connection: 1-1/4in male NPT Material: Aluminum Working Fluid: Air or inert gas Maximum Operating Pressure: 250 psi (17 bar) Flow Coefficient: 17.4 Exhaust Silencer Type: Cylindrical NITRA pneumatic exhaust silencer, aluminum, cylindrical, Cv=17.4, 1-1/4in male NPT.