Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TSS1EFA found under Line Section Radio Frequency Tra by Telonic Berkeley Inc. The National Stock Number assigned to this part is 5985001643131, 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 TSS1EFA.