1.Wide Application: Centrifuge tubes can storage solid or liquid material. Widely used in laboratory, food coloring, clinical chemistry, research institution, crafts and so on. 2.Great Sealing Performance: test tube with lid can reduce the pollution of samples and avoid liquid volatilizing and leaking. 3.Material: sample vial is made of material, security and environmental protection. surface of pipe wall can reduce liquid absorption and residue, ensuring the validity of experimental . 4.Transparent: 1.5ML conical microtube is clear with standard scales. Convenient to distinguish different chemicals and help you use standard dose to accuracy of test. colour:Transparent material:plastic size:4cm Package Contents: 1000 * test 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.