Four-Way tube rack is autoclavable. By linking together, create as large a rack as you require with multiple racks. Racks feature a unique system of tabs and slots, which facilitate easy assembly and sturdy fit. Heavy-duty polypropylene racks can hold (4) 50mL conical tubes, (12) 15mL conical tubes, (32) 1.5mL microtubes or (32) 0.5mL microtubes. Available in natural, blue, or assorted colors (one of each).