Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number LSR01026A4120 found under Lightwarning by Whelen Engineering Company Inc. The National Stock Number assigned to this part is 6220016880149, and the Federal Supply Class is 6220 Electric Vehicular Lights And Fixtures. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like LSR01026A4120.