Exhaust Muffler Pneumatic NPT Port (In.) 1/4 Max Pressure (PSI) 300 Max Temp 300 Degrees F 40 Microns Sintered Bronze Element Material Nickel Plated Steel Fitting Material Hex (In.) 9/16 Length (In.) 1-3/8 Reduce Exhaust Noise Levels to Acceptable OSHA Requirements