Description: : 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. Color Code: Red Specifications: Ø13x75mm, Ø13x100mm General Sampling Dosage: 2ml, 3ml, 4ml, 5ml, 6ml, 7ml Maximum Centrifugal Rotation Speed: 5000 turns/min. Blood Cloting Time: ≤2.5h Operation Temperature: 0 ℃-37 ℃ Maximum Vacuum Tolerance: ±10%