Polypropylene freezer box holds tubes with a maximum OD of approximately 0.65” x 2.4” H (16.5 x 60 mm). A fully closed box measures 5.1” L x 5.1” W x 1.8” H. Each box has a frosted writing surface and vent slots under each cell. Permanent dividers won’t lift out. Withstands freezing (-90°C) or autoclaving.