Description Are you looking for a practical for your experiment? Do you want a reliable test tube ? If your answer is yes, please come and take a look at this product. This test tube set is made of high-quality material, which has the long service life. It will meet your experiment sealing needs. Features - Color: As Shown. - Material: Rubber. - Size: 2.70X1.90X1.90cm/1.06X0.75X0.75in - Perfect for chemical industry, medicine and other scientific researches use. The practical rubber stoppers, easy to pull and remove, save time and labor. - Made of food grade rubber material, and safe to use, you can use them trustingly. - It can be used with the glass tube. It is a necessary opening rubber kit for experiments. - Not only suitable for professional research institutions, also suitable for individual containers that need to be sealed. - Small and compact, easy to store and use, not taking up any space of home or laboratory. Perfect for chemical industry, medicine and other scientific researches use. The practical rubber stoppers, easy to pull and remove, save time and labor. Made of food grade rubber material, and safe to use, you can use them trustingly. It can be used with the glass tube. It is a necessary opening rubber kit for experiments. Not only suitable for professional research institutions, also suitable for individual containers that need to be sealed. Small and compact, easy to store and use, not taking up any space of home or laboratory.