Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BILIRUBIN 2 found under Bilirubin Test Reagent by Beckman Coulter Inc. The National Stock Number assigned to this part is 6550013543103, 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 BILIRUBIN 2.