Profile: Zhejiang U-Real Medical Technology Co., Ltd. offers blood collection tubes. We develop and manufacture blood collection tubes. Serum tubes are used for biochemical tests. The interior wall is finely coated with clot activator which accelerates the blood coagulation process after collection. The advanced coagulant formula results in moderate blood coagulation in a relatively short time, avoiding potential hemolysis problem that is caused by too rapid clotting. This generates clear transparent serum specimen after centrifugation. ESR tubes are used for blood sedimentation tests. They contain sodium citrate solution with the concentration of 3.8%. The plasma tube contains heparin lithium or heparin sodium as anticoagulant. Normally, 16 IU heparin can anti-coagulate 1 ml of blood. The heparin tubes are mainly used for biochemical tests in emergency treatment blood flow transformation tests.