EDTA K2 K3 Blood Collection Tube is suitable for general hematology tests, it is the test tube of choice for routine blood tests, glycosylated hemoglobin, and blood type tests. EDTA coated blood collection tubes can protect blood cells, prevent platelet aggregation, and protect blood cells in shape and volume for a long time.  EDTA has little effect on blood cell morphology and platelet count and is suitable for a number of hematological tests such as complete blood cell count.