Are you still looking for a teaching apparatus for let your student do some experiments? Then, our test tubes are one of the for you. Using plastic material, it is safe and durable. A teaching aid set for you. Features - Color: Transparent and white. - Material: . - Size: 10.50X1.60X1.60cm/4.13X0.63X0.63 inch. - As a teaching tool, it can encourage your kids to explore , generate interest and improve academic performance. - As a storage container, it can be used to store daily liquids, cosmetics, salt, etc. - The test tube set is well sealed to keep the stored objects free of dirt and moisture. - Suitable for home, laboratory, travel, school, university, training institution, research institute, etc. - 50 test tubes are included, sufficient quantity to meet your requirements. Package list: 150 tubes