Unique Bargains 13x100mm Plastic Round Base Test Tubes with Cork Stoppers 50 Pack

[Material] - Made of polystyrene(PS), no bubbles, corrosion-resistant, more durable than other plastic.||[Size] - Inner Diameter: 11mm / 0.43"; Tube Diameter: 13mm / 0.51"; Tube Length: 100mm / 3.94".||[Sealing] - With a cork stopper, wood material, good seal, and can be used repeatedly after cleaning.||[Storage Application] - Great for storing liquid, powder and small objects such as beads, plants, oil, etc.||[Specimen Collect] - Suitable for collecting Specimens in molecular biology, chemistry, biochemistry, also can be used in scientific experiments, party decorations.