Package Includes: you will receive 4 pieces of 1/4 inch NPT threaded pressure relief valve with seal thread locks, enough for your daily use and replacement, providing more made of brass, the NPT threaded air compressor parts have corrosion resistance, high temperature ductility and low magnetic permeability, suitable for discharging air, water and oil from air compressor the working pressure of safety release valve is 150PSI, the flow is 178 cfm, and the temperature range is from -65 degrees Fahrenheit to +250 degrees Fahrenheit the 1/4 inch brass air pressure release valve for using in high temperature applications up to 250 degrees Fahrenheit, pay attention to safety when using the air compressor pressure valve can reduce overpressure or vacuum in the system; Color: Gold Material: copper alloy Package Contents: 4 x safety valve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.