Made of High transparency PP material, apply to Micro-centrifuge, disposable The vial tubes are designed with clear scale on tube body, which facilitate accurate sampling,easy to observe Snap cap design that it 't be opened accidentally, not easy to leak and safe to use Used in molecular biology, clinical chemistry and Bio-chemistry research, perfect for working with delicate samples, storing tiny specimens perfect for many fields,like lab experiment and home use for taking certain volume liquid Material: plastic Color: Clear Capacity:2ml Length:42mm diameter:8mm Package Contents:500 x Plastic Centrifuge Tube Only the above package content, other products are not included. Note: Light 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.