Discover the versatility of our round-bottom glass test tubes with cork stoppers. These test tubes are crafted from cork and glass, ensuring durability and resistance to high temperatures. Ideal for laboratory sampling and storage, they offer a 20ml capacity, making them fit for various scientific experiments. Features -Color:Transparent -Material:Glass, cork -Size:15.50X2.00X2.00cm/6.09X0.79X0.79in Volume: 20ml -Crafted from glass and cork, these storage tubes are designed to withstand high temperatures and resist corrosion, ensuring durability in various laboratory settings. -The round bottom design of these glass test tubes offers stability, significantly reducing the likelihood of tipping over during experimental procedures. -With a generous 20ml capacity, these test tubes are ideal for a wide range of laboratory sampling and storage applications, accommodating various needs. -Each tube comes with a cork stopper, making them fit for storing samples securely and preventing any potential risk. -These versatile propagation tubes are suitable for a variety of uses, including chemical and biological experiments, diy crafts, and even plant propagation projects. Package list: 20 tubes