Brand New Nurad Cobham offset Electronic Counter Measures High Power Airborne Horn Antenna used on the F 16. Frequency is 8 to 18 GHz. Circular Polarization, High Power (300 watts CW at 70,000 ft), low VSWR, Low Axial Ratio very unique quad ridged design. Included that are in the manila folder with no proprietary markings are all the machining drawings with dimensions, manufacturing approach and step by step Process guide to build, machine, and assemble these and then you can use this one as your calibration standard.