Name No additive Tube Description: Color Code Red The no additive tubes are applicable to the immunochemistry, immunology, serumology and all kinds of virus tests as well as the blood sampling and storage in blood collection stations. The tube walls are specially processed for preventing the sticking and hemolysis, which not only blood sampling tubes but the test tubes. Name PT Tube Description: Color Code Blue PT tubes are applicable to the checks for blood coagulation. The vacuum tubes are designed according to the 1:9 proportions of anti-coagulants and blood samples. It can ensure an accurate blood dosage and anti-coagulants quantity as well as the high precision. Because the low toxicity of the sodium citrate, it can also be used to the blood storage Name ESR Tube Description: Color Code Black The tubes are specially used for determination of the erythrocyte sedimentation rate (ESR) by the Westergren's Method. The mixing ratio is 1 part citrate solution to 4 parts blood. ESR measurements refer to the Westergren method. Name Heparin Tube Description: Color Code Green The heparin tubes are use to blood sampling in clinical biochestry, emergency care biochemical and hemorrheological tests.