Features: 1. Disposable centrifuge tube, clear white, conical bottom, 0.5mL graduated, 2. Containing anticoagulation component: EDTA-K2, may cause some white spots inside the tube which does not influence the result of use. 3. Made from high quality PP, high transparency, no bubble and impurities. 4. Attached cap design with high leak-tightness, avoid sample leakage effectively. 5. High temperature, high pressure sterilization, acid and organic solvents resistance. 6. Perfect for blood corpuscle experiment, protein seperation experiment, lab centrifugal separattion experiment, etc.