Interstate Pneumatics FPC240 Brass Female Coupling Adapter 1/8 Inch X 1/4 Inch NPT Female Threads: 1/8 inch x 1/4 inch NPT Female - Machined (Provides seal tight threads) Temperature Range: -65 F to 250 F Maximum Operating Pressure: 250 PSI Conformance: ASME, SAE, NPT Material: Brass - Excellent strength and ductility, corrosion resistance, low magnetic permeability