81-grid microcentrifuge tube holder with a connected lid for efficient sample organization and quick access. The 81-grid layout keeps tubes neatly in place, enabling fast locating and retrieval. Tube storage container with a user friendly design that simplifies the storage process, helping to save time during busy workflows. Constructed from sturdy paper and plastic materials, this storage box is durable, safe, and resistant to deformation, providing reliable performance in freezer environments. The paper freezing tube box is a must have for laboratories conducting freezing storage experiments, offering organized and accessible tube storage. key features - 81 grid design with connected lid for organized, visible access - durable paper and plastic construction - stability and deformation resistance for long term use - suitable for freezer storage of microcentrifuge tubes practical applications - set up experiments by organizing samples in the 81 grid for quick access - store tubes in the freezer with clear labeling and secure placement - transfer and reorganize tubes between workstations while keeping contents protected with the connected lid