Color code your laboratory with heavy duty, autoclavable polypropylene microtube racks. Ideal for freezing, storing, and transporting 0.5 to 2.0mL samples. Designed with 80 wells in a 16 x 5 configuration. Each well is numbered for sample identification. Packed five racks per bag. Available in natural or an assorted color pack; pack includes one each blue, green, orange, pink, and yellow.