These glass test tubes are simple to fill, good transparency for easy observation. for general purpose and laboratory use, and widely used in scientific experiments, Halloween party decorations, to store liquids, to culture plants, etc. Features -Color:Transparent -Material:Glass, wood - Size: 10.50X1.00X1.00cm/4.13X0.39X0.39in - The test tubes are made of glass and wood cork material, smooth inner surface, sturdy to use. - The cork stopper provides seal, preventing any or leakage of the contents. - Sturdy and compact, test tubes are convenient to carry and store without occupying much space. - Glass test tube with cork can be easily labeled with the contents or experiment information, making organization and identification of samples effortless. - The abundant quantity can can meet your various experimental needs, meeting your professional laboratories. Package list: 20 x glass test tubes