Elevate your laboratory experience with the Kimble/Kontes KIMAX Test Tubes. Crafted from high-quality borosilicate glass, these reusable test tubes are designed for durability and thermal resistance. Each tube comes with a secure glass stopper, ensuring your samples remain uncontaminated and safe. Ideal for various applications, from chemical experiments to educational purposes, these test tubes are easy to clean and maintain. With the Kimble Chase 45100 13100 model, you can trust in their precision and reliability for all your scientific needs. Perfect for professionals and students alike!