Low-cost choice with excellent low-temperature storage properties. One-size box safely stores 15 and 50 mL tubes in LN2 or mechanical freezers. Designed with bottom drain holes to prevent moisture buildup and provide drainage. Snug-fitting lid is designed so that tube caps do not touch the top. Two partitions to choose from. Measures: 145 x 145 x 122 mm. Packs of 10.