Gel and clot activator tubes, commonly known as serum separator tubes (SST), are specialized tubes used in medical laboratories for blood collection and processing. These tubes are designed to collect blood samples for various diagnostic tests that require serum, which is the liquid portion of blood obtained after coagulation.Featuring a loading capacity of 3 mL / 4 mL ensure convenient storage of sample at 4 °C to 25 °C temperature.