About this item:
Package: 30-pack 13ml transparent glass test tubes with cork stoppers. 
Size: 0.6 inches × 3.9 inches / 15 × 100mm, volume: 13ml. 
Material: The glass test tubes are made of high-quality borosilicate glass and can be heated and reused. 
Features: Each glass test tube is equipped with a cork stopper, and has a good seal. High-quality glass makes the test tube have good heat resistance and can be used at high temperatures. 
Use: They can be used to store liquid, bath salts, powder, candy, samples, and beads. Transparent test tubes are suitable for various scientific experiments, plant propagation, making crafts, holiday parties, and home decoration.