Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ELR-TNFALPHA-001 found under by Raybiotechinc. The National Stock Number assigned to this part is 6550015831028, 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 ELR-TNFALPHA-001.