and high-quality low borosilicate glass tubes: These test tube lenses are made of low borosilicate glass materials, which are sturdy and , have good heat resistance, and can be applied at high temperatures to long-lasting use; Clear main colors allow for easy observation and analysis of content Sufficient capacity for various applications: The glass test tube of plants has a capacity of approximately 13 milliliters, providing sufficient space for multiple purposes; Whether you are conducting experiments, storing samples, candies, bath salts, chewing , jelly, chocolate chips, biscuit nuts, or creating crafts, the test tubes of these crafts can accommodate a wide range of applications Leak proof and portable design: Say goodbye and worry about leaks or spills; These glass scientific tubes are equipped with cork plugs, ensuring a safe and sealed seal. Place these testing laboratories in a situation where there is no need to worry about accidents Spacious quantity and convenient size: 200 test tube packaging with cork stoppers, you always have enough money to meet your needs, suitable for DIY bathroom salt and candy tube containers, scientific experiments, and plant growth; The size of the glass tube with a cork stopper is approximately. 15 x 100mm, making it easy to handle and store Multi functional applications: Enjoy the versatility of these test tube containers as they can be applied in various environments and occasions; These circular laboratory test tubes are very suitable for laboratories, classrooms, scientific projects, DIY handicrafts, and more.