Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number XB4PP220 20 found under Filter Band Pass by Wavetek Rf Products Inc. The National Stock Number assigned to this part is 5915012761162, and the Federal Supply Class is 5915 Filters And Networks. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like XB4PP220 20.