Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S4B120 352 5 10 0 found under Filter Band Pass by K And L Microwave Inc. The National Stock Number assigned to this part is 5915010791449, 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 S4B120 352 5 10 0.