Dixon CMF38 Nickel Plated Steel Air Hose Fitting, Conical Muffler, 3/8" NPT Male Muffler for reducing volume of sound Connects to a female NPT threaded connection Nickel-plated steel for better weldability and increased rust resistance than unplated wrought iron Maximum operating pressure of 300 psi (10.20 bar) in a temperature range of +35 to +300 degrees F (+1.67 to +148.89 degrees C) Conforms with OSHA standard 1910.95