This order includes 200 sterile, plain PET tubes, each holding 10 ml. They contain no additives, so the blood collected stays unaltered. That makes them suited for serum-based testing, where additives in the tube would interfere with results.
One thing to check before ordering: "plain, no additives" means there is nothing in the tube to prevent clotting or preserve cells. That is intentional for certain lab workflows, but it is not the right choice for every test. If you are unsure which tube type your protocol calls for, check with the requesting clinician or your lab guidelines first.
