Single Analyte DAU Calibrator (5 mL) || Norbuprenorphine: Cutoff Calibrator; || IVD - for in vitro diagnostic use only; || Lin-Zhi International || Sunnyvale, CA || The Norbuprenorphine Drug of Abuse (DAU) cutoff Calibrator is used for qualitative and semi-qualitative calibration of the Lin-Zhi Internal, Inc. Buprenorphine (BUP) enzyme Immunoassay (REF # A53684) on the Synchron Clinical Analyzer