Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number L1-E1 found under Lamp Lensometer Ocu by Marco Ophthalmic Inc. The National Stock Number assigned to this part is 6240014162313, and the Federal Supply Class is 6240 Electric Lamps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like L1-E1.