... , RNA enzymes, proteins, DNA, heat and metal Color: Natural 0.5ml Centrifuge TubeGraduated microcentrifuge tube, optical flat cap, writing area. Tube ... , RNA enzymes, proteins, DNA, heat and metalColor: Natural ProductsPackage Specification0.5ML Microcentrifuge Tube1000/bag,10bags/ctn 15ml centrifuge tube blue & red ...