Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5NP78-1227 E19.5-N N found under Reject Filter Band by K And L Microwave Inc. The National Stock Number assigned to this part is 5915016745395, 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 5NP78-1227 E19.5-N N.