Broad compatibility This centrifuge tube rack has two different sizes of wells and is suitable for 10 ml, 15 ml, and 50 ml centrifuge tubes and laboratory test tubes. Temperature and chemical resistance Plastic construction with a use temperature range of 80 C to 70 C. Not suitable for boiling disinfection. Resistant to acids and alkalis. Detachable design and easy assembly Plastic detachable rack with a simple structure that is quick and easy to assemble. Practical and organized Keeps tubes upright and organized, reduces the risk of tipping or mixups, and improves workflow in the lab. Note Test tubes pictured are for display purposes only and are not included. Typical use scenarios In the lab bench during sample preparation and centrifugation: organize tubes by size for quick access and efficient workflow. In cold or ultracold storage: securely hold tubes in an upright position within the 80 C to 70 C range during freezing or thawing. In teaching labs or demonstrations: provide a compact, easytoassemble rack to display multiple tubes and facilitate handson activities.