Evergreen's 81-well freezer box has a 9x9 configuration and can accommodate 1.0 ml & 1.5 ml tubes. It has two frosted areas for writing and is alpha-numerically labeled. The freezer box is made of premium-grade polypropylene and comes with a transparent lid with allows for easy visibility of all tubes in the box. Boxes will withstand low temperature freezing down to -90°C, and are available in 6 colors (one natural and five fluorescent). Dimensions; 5.25" x 5.25"