This graduation-printed centrifuge tube comes with a large writing area to let you identify the sample stored inside. This tube boasts a molded-in seal ring that eliminates the chances of leakages and contamination. It is made of a good-quality material with high chemical resistance, allowing you to use it for experiments involving a wide range of solutions and reagents. Featuring a transparent exterior, it allows you to see what's inside the tube. Each tube comes with a screw cap.