EDTA Tube is widely used in clinical haematology as well as various kinds of blood cell test instruments. It makes use of EDTA 2K/ EDTA 3K/ EDTA 2Na as anticoagulant. Meanwhile, it offers a comprehensive protection for blood cell, especially for protecting the blood platelet, so that it can effectively stop the gathering of blood platelet and makes the form and volume of blood cell uninfluenced in a long time.