Labcon 24-Place and 48-Place micro centrifuge tube and cryo-vial storage system. For 1.5mL and 2.0mL tubes. These racks fit into Labcon pipet tip boxes and are made of recycled plastic. Fully autoclavable (122°C) and freezable (-190°C). Stackable racks float in your water bath and can in corpo rate dry ice for use with frozen samples on the bench. Holds 1.5, 1.7, 2.0 mL microtubes Made of polypropylene Freezable to -80C Autoclavable Made in USA