Designed to fit in a standard 2" freezer rack, this 144-place PCR Tube Freezer Box will hold individual and/or strip 0.2 mL PCR tubes.Designed for ULT freezer storage at temperatures down to -86 °CDurable and impervious to moistureClear polycarbonate lid and base, and alpha-numeric index make it easy to identify samples within the boxTwo boxes may be stacked to fit together in one space in a 2" freezer storage rack if using flat-capped PCR tubes