All-in-one liquid immunoassay multi-analyte control kit designed for use with the FREND Analyzer.Includes PSA, TSH, Vitamin D, Free T4, and Testosterone controls — all analytes conveniently provided in one vial.Six-month supply (12-vial kit) containing 2 control levels (2 × 6 vials × 3.0 ml fill).Ideal for in-office or reference laboratory testing environments seeking streamlined calibration and consistent quality assurance for hormone and metabolic panels.Lot #6360A25001