The one-step MET (Methamphetamines) test is a simple one step immunochromatographic assay for the rapid, qualitative detection of MET and its metabolites such as oxidized, deaminated derivatives in urine.The MET test is based on the principle of the highly specific immunochemical reactions between antigens and antibodies which are used for the analysis of specific substances in biological fluids. The sensitivity of the test is 1000 ng/ml of MET.