Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number L2KPR2 found under Assay Proactin by Siemens Healthcare Diagnostics Inc. The National Stock Number assigned to this part is 6550015836556, 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 L2KPR2.