Package Included: You will get 36 plastic bottles, measuring approximately 20.5 mm diameter, 59.5 mm height, inner diameter: 14.5 mm, capacity: 5 ml (0.17 fl oz). Sufficient quantity for various uses. High Quality: The 5 ml centrifuge tubes are made of durable plastic, resistant to high and low temperatures, and suitable for long-term freezing. They offer good airtightness, preventing leakage and evaporation, ensuring safe usage. Easy to Use: Each graduated plastic centrifuge tube features a screw cap. Simply unscrew the cap, fill the tube, then securely tighten the cap to prevent leaks. Storage Box: These test tubes come with a plastic storage box for convenient organization, helping maintain a clean and orderly workspace. Wide Range of Applications: These small sample tubes can store liquids, solids, powders, seeds, pills, essential oils, perfumes, dyes, granular materials, and more. Ideal for use in hospitals, research laboratories, and other professional settings. Material: Plastic Color: As shown Package Contents: 36 x Freezing Tubes 1 x Plastic Storage Box Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.