ULT Freezer Storage Boxes Hold Up to Demanding Temperatures Plastic freezer storage boxes are available in two sizes and hold either 1.5 to 2ml micro tubes / cryo vials (81-place box) or 5ml conical centrifuge tubes, including Eppendorf* brand (25-place box). 81-place micro tube / cryo vial box fits standard 2” ultra-low temperature (ULT) freezer racks 25-place 5ml conical centrifuge tube box fits standard 3" ultra-low temperature ULT freezer racks Durable polypropylene; can withstand temperatures to -86°C (-187°F) Clear translucent lids permit easy viewing of samples Alphanumeric grid for easy sample management *Eppendorf is a registered trademark of Eppendorf AG.