Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4IB30-400 12-P P found under Filter Band Pass by K And L Microwave Inc. The National Stock Number assigned to this part is 5915012761161, 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 4IB30-400 12-P P.