J&K Scientific's polypropylene microcentrifuge tube racks are made of sturdy, high quality plastic, and is reversible to fit both 1.5mL and 2mL microcentrifuge or PCR tubes. With side handles, matte side panels for labeling, and etched numbers on the surface for easy tube identification, these racks are designed to ensure your lab's needs are met. Comes in 5 colors - yellow, red, blue, green, and purple.