Brand new air compressor unloader pilot valve, made in the USA. The valve is used to operate a compressed air system at a constant run with a preset pressure operating range to actuate throttle controls, intake unloaders or air actuated discharge valves. The valves preset operating range is 95-125 PSI, it has 1/4" Female NPT threads that would be used for air hook-up or screwed into the compressor tank and has 1/8" female NPT threads on the side of the valve (as shown in the picture). The 1/8" threads are the port used to control a throttle, intake unloaders or discharge valve. If more than one outlet is needed it is common to use a "tee" to make multiple ports which can be purchase at a local hardware store.