Descripción: MYM’s well-designed test tube racks are made of high density polypropylene, and are autoclavable and non-floating in a water bath. Sizes range from 13mm to 30mm and, therefore, accommodate all routine tubes. The 30mm size rack is especially suitable for 50mL centrifuge tubes. Alphanumeric markings are molded into the racks to provide easy test tube identification. They are available in four colors for color coding of test samples, or simply for aesthetics in the modern laboratory. The racks are shipped flat in order to reduce shelf space and then simply snapped together for use. They are stackable for convenient storage.