Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number LE S B 1 R 120 277 ELN found under Sign Interior Illum by Lithonia. The National Stock Number assigned to this part is 9905013576556, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like LE S B 1 R 120 277 ELN.