P.I.P. Conical Tube Rack is made from polypropylene, is autoclavable, freezable, and resistant to most of the common laboratory acids and chemicals. It has alphanumeric grid for an easier retrieval of tubes. One of the advantages of this rack is that it can be collapsed and reassembled to save space when necessary and autoclave a larger quantity of them at the same time. It is available in 2 different models in yellow and orange to facilitate classification.