Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E.E.S. 200 found under Erythromycin Ethylsuccinate Oral Suspension Usp by Abbott Laboratories Inc. The National Stock Number assigned to this part is 6505011431594, 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 E.E.S. 200.