Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WF1890 found under Horn Waveguide by Amplifier Research Corp. The National Stock Number assigned to this part is 5985016121398, and the Federal Supply Class is 5985 Antennas Waveguides And Related Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WF1890.