Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SI-07-F found under Filter Band Pass Ba by Espey Mfg And Electronics Corp. The National Stock Number assigned to this part is 5915009374440, 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 SI-07-F.