6-Pack 5ml Glass Test Tubes with Caps, Graduated Lab Vials for Aquarium Water Sampling and Liquid Measurement, 4 x 1/2 Inch

6-Pack 5ml Glass Test Tubes with Caps, Graduated Lab Vials for Aquarium Water Sampling and Liquid Measurement, 4 x 1/2 Inch

• Lab-Grade Glass Test Vials – This 6-pack of transparent 5ml glass tubes is designed for reliable liquid sampling and observation. The clear body allows for easy visual inspection of sample color and clarity during routine aquarium water analysis.
• Precise Graduated Markings – Each tube features clear measurement lines to ensure accurate dispensing and volume readings. Suitable for measuring liquid reagents and water samples for hardness, carbonate, nitrate, nitrite, and pH level testing.
• Secure Screw Caps – Equipped with durable plastic lids that seal tightly to prevent leaks and spills during shaking or transport. Keeps your liquid specimens contained and organized.
• Compact & Durable – Each tube measures 4 x 1/2 inches (102mm x 12mm), fitting standard test kit holders. The sturdy glass body is reusable and easy to clean after each use.
• Versatile Lab Use – Ideal for aquarium hobbyists, classroom science experiments, school laboratories, and general liquid sample storage. A practical tool for anyone needing precise liquid handling.