Shop Translucent Plunger, Cervical Collar, PDS™ II, For Calibration and Validation of Drugs of Abuse Enzyme Immunoassays for the Detection of Amphetamines, Barbiturates, Benzodiazepines, Cocaine Metabolites, Methadone, Methaqualone, Morphine, Phencyclidine and Propoxyphene in Human Urine