The Corning® CoolRack M90 is a high-quality microcentrifuge tube holder designed for use in microbiological laboratories. Made by the reputable brand Corning® in the United States, this unit can hold up to 90 x 1.5 or 2 mL microcentrifuge tubes. Its innovative design provides a secure and organized way to store and transport these tubes, making it an essential accessory for laboratory research and testing. With its reliable brand reputation and specific model name, users can trust in the quality and performance of the CoolRack M90 holder for their scientific needs.