Are you still looking for a teaching device for your students to do some experiments? Then, our test tube is one of your best choices. Made of plastic material, anti-drop, leak-proof, safe and durable. A perfect helper of chemistry teaching aids. Features - Material:Plastic.- Size:10.00X1.20X1.20cm/ 3.93X0.47X0.47in .- Note: The brush style and color is random. - Encourage your child to explore the world of science, stimulate interest and improve academic performance.- Portable and small, easy to store and carry. It can be used not only for chemical experiments, but also for storing daily liquids.- Widely used in homes, laboratories, tourism, schools, universities, training institutions, research institutes, etc.- Suitable for storing bath salts, candies, liquids or other objects, and the plastic case is drop-proof.- The stopper is easy to seal and tighten, and has good leak-proof performance. Packing list: 100 x Plastic Test Tubes1 x tube brush