1[Versatile Test Tube Rack] This 28 well test tube rack features two different hole sizes suitable for 15ml, 50ml centrifuge tubes and laboratory tubes. 2[Detachable Design] The test tube holder can be easily disassembled and assembled, providing convenience for storage and transportation, making it ideal for use in different settings. 3[Sturdy Construction] Constructed from premium plastic, this plastic centrifuge tube holder is sturdy and lasting, with a temperature range of 20 to 70 (cannot be boiled), resistant to acids and alkalis, ensuring long term use. 4[Multipurpose Use] Suitable for holding test tubes, perfume bottles, lip balms, pens, and ink samples, this test tube stand is perfect for scientific laboratories, classrooms, and home use. 5[Reliable Tube Storage] This detachable test tube rack provides secure and stable storage for various laboratory tubes, enhancing efficiency and organization in laboratory environments. 10 x Tube Rack Boards 20 x Support Rods