Quality Material for Durability: the test tubes with racks are made of quality plastic which ensures durability and ; They are not easily prone to breaking or cracking, making them suitable for various applications Package Inclusion: each package comes with 2 pieces of well structured racks and 12 pieces of test lab tubes; The set is sufficient for your experimental, decoration, or storage needs, reducing the need for purchases Proper Size : the test tube holder racks providing sufficient space to hold your substances; Their Perfect size makes them easy to handle and gain precise control over your experiment or decoration tasks Vibrant and Appealing Color Scheme: this set of test tubes and test tube holders sports an attractive color scheme; The racks are red, while the test tubes are transparent and capped with a blue lid that adds an appealing touch; The striking color combination adds a dash of dynamism to your experimental or decoration settings Features for Fun and Safe Experiments: the set comes with twist caps for the plastic test tubes that assure a good airtight seal; Simply pour your sample into the test tube, twist on the cap and place the test tube on the rack for your observations, this feature ensures a secure hold, preventing the likelihood of accidental spills or leaks