There is a procoagulant in the blood collection tube of the orange cap tube to accelerate the coagulation process. The rapid serum tube can coagulate the collected blood within 5 minutes, which is suitable for emergency serum series tests. It is the most commonly used coagulant test tube in daily biochemistry, immunity, serum, and hormone. The separation gel coagulant tube is the yellow top blood tube. It is have separating gel and coagulation. The specimens remained stable for 48 hours after centrifugation. The procoagulant can quickly activate the coagulation mechanism and accelerate the coagulation process. The type of serum preparation is suitable for emergency serum biochemical and pharmacokinetics tests The serum tube red cap blood collection tube contains no additives, no anticoagulant, and procoagulant ingredients, only a vacuum blood collection tube. It is used for routine serum biochemistry, blood bank, serology-related tests, and various biochemical and immunological tests, such as syphilis, hepatitis B quantification, etc. It does not need to be shaken after a blood draw.