... , proteins, DNA, heat and metal Color: Natural 0.5ml Centrifuge TubeGraduated microcentrifuge tube, optical flat cap, writing area. Tube can ... be frozen down to -80 andheated to 121. Max RFC: 21000gWithout any detectable DNA enzymes ... Natural ProductsPackage Specification0.5ML Microcentrifuge Tube1000/bag,10bags/ctn 15ml centrifuge tube blue & red (cap),25/bag,20bags/cs50ml ...