The National Institute on Aging requires 49 specific Human Putative Humanin Peptide ELISA kits (CSB-EL015084HU) to measure serum levels in participants of an ongoing longitudinal study. The period of performance is 12 months from the date of award, with delivery required within 2 weeks of award acceptance. Services will be performed for delivery to the NIH/NIDA in Baltimore, Maryland. The award will be a firm fixed-price purchase order based on the brand name requirement, salient characteristics, price, and delivery. This procurement is for commercial items and is not expected to exceed the simplified acquisition threshold.