for educational purposes, these clear plastic tubes can be used in science experiments and classroom activities. Their child-friendly design makes them safe for use by young learners, while the transparent material allows for easy observation of reactions and changes within the tube. Features -Color:Transparent -Material:PVC, acrylic -Size:23.50X1.50X1.50cm/9.24X0.59X0.59in -Transparency: the transparent hard plastic material allows for clear visibility of the contents, facilitating easy observation during experiments. -Odor prevention: the agarwood tube design effectively prevents the spread of odors, keeping the experimental environment fresh. -Multifunctional: suitable for use in various fields such as chemistry and biology, meeting a wide range of experimental needs. -Chemical resistance: high resistance to from different chemical reagents, ensuring the safety of your experiments. -Durability: constructed from durable hard plastic, these tubes are reliable and maintain their shape over longterm use, ensuring accurate results. Package list: 4 pcs x 16 experimental round tubes