Gel+Clot Activator Tube, which used for blood collection, is suitable for the project observation of biochemistry and immunology,etc.Tube with inert separation of plastic and coated with coagulant, used to separate blood cells and serum, which can increase the amount of serum. There are six kinds of volume specification:3ml, 4ml, 5ml, 6ml, 7ml and 10ml, including the material of PET and glass.