Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RELISTOR - S.C. INJ. 12MG 0.6ML found under Methylnaltrexone Br by Pfizer Inc. The National Stock Number assigned to this part is 6505015886571, 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 RELISTOR - S.C. INJ. 12MG 0.6ML.