Celltreat 1.5 mL Black Micro Laboratory Tubes are designed for general laboratory and research applications. Constructed from durable polypropylene, these tubes feature frosted marking spots and engraved graduations for easy labeling and accurate measurements. The attached flat-top caps allow convenient one-handed opening and closing. The black color provides protection for light-sensitive compounds, eliminating the need for foil wrapping. Features: Polypropylene construction ensures durability and chemical resistance Frosted marking area and engraved graduations for accurate labeling Flat-top cap for secure sealing and one-hand operation Black color protects light-sensitive samples Pre-cleaned and ready for laboratory use Note: For laboratory and research use only. Not intended for medical, diagnostic, or blood collection purposes.