Calling all science enthusiasts and lab pros! These faruijie test tube racks are exactly what you need to keep your workspace organized and efficient. Each pack comes with five blue plastic racks that can hold up to 40 test tubes each - that's 200 tubes total if you use all the racks! The holes are designed for 20mm diameter tubes, which fits most standard lab tubes perfectly. Made from durable PP plastic that's lightweight but surprisingly sturdy, these racks won't crack or break under normal use. The three-layer design makes inserting and removing tubes super easy - no more struggling to get tubes in or out of tight spaces. What's great is how versatile these are beyond just lab use. Sure, they're perfect for actual scientific work with test tubes and centrifuge tubes, but they also work amazingly for organizing makeup brushes, art supplies, small tools, or even holding candy and party favors! They're completely washable with water, so cleaning up spills or switching between uses is simple. The bright blue color makes them easy to spot in busy labs or workspaces. Whether you're setting up a home lab, teaching students, working in a professional laboratory, or just need organized storage for small items, these racks deliver serious value. The fact that you get five identical racks means you can dedicate different racks to different projects or experiments. Setup is literally seconds - just take them out of the package and start loading up your tubes. For the price, you're getting quality organization that makes any workspace more efficient and professional-looking!