Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC00028-0071-73 found under Metoprolol Tartrate Tablets Usp by Ciba Geigy Corp. The National Stock Number assigned to this part is 6505011337758, 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 NDC00028-0071-73.