0.5ml centrifuge tube,Flat Cap Without any detectable DNA enzymes, RNA enzymes, proteins, DNA, heat ... Color: Natural 0.5ml Centrifuge TubeGraduated microcentrifuge tube, optical flat cap, writing area. Tube can be frozen down to -80 andheated ... Microcentrifuge Tube1000/bag,10bags/ctn 15ml centrifuge tube blue & red (cap),25/bag,20bags/cs50ml centrifuge tube blue & red (cap)25/bag,20bags/cs