This 64-well ‘Reversible’ Micro Tube Rack is designed so that one side of the rack accommodates 0.5mL microcentrifuge tubes. The reverse side holds 1.5 to 2.0mL microcentrifuge tubes and screw cap microcentrifuge tubes. The polypropylene rack replaces the 5-1/4 x 5-1/4in freezer storage box. It has two frosted writing areas for sample identification, and alpha-numeric markings A-H vertically with numbers 1 through 8 horizontally. It is autoclavable at 120°C at 15lbs for 15min, and will withstand freezer storage down to -90°C. Comes in an assortment of colors, with one package each of fluorescent blue, green, orange, pink, and yellow. Supplied 5 per pack, with 4 packs per case. Snap on cover sold separately. Autoclavable. Material: Polypropylene. Feature: Reversible. Number Of Wells: 64. Reversible Capacity: 0.5mL/1.5-2.0mL. Color: Fluorescent Assorted. Bio Plas® #: 0081F.