Interstate Pneumatics FL366 Easy Lock Brass Hose Fittings, Connectors, 3/8 Inch Hose Barb Splicer Threads: 3/8 inch Hose Barb Splicer - 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