Easy to marking area: Plastic centrifuge tubes include a convenient white writing patch compatible with easy marking and identification. This little mark tube feature is very convenient compatible with labelings purposes.Material: The self-standing centrifuge tubes are made of quality PP (polypropylene).Application: Apply to loading solid, liquid, powder, seeds, pills, granular objects etc.Colour:As ShownMaterial:PlasticPackage Contents:50 * 50ML Self-Standing Centrifuge TubesOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.