P.I.P. Microtube Combo Rack is designed in two models, suitable for accommodationg different microtubes in one box which allows user to keep the samples cold. To do so, the box’s lower container can be filled with crushed ice or water. This rack is made from polypropylene which is autoclavable and freezable and resistant to most of the common laboratory acids and chemicals. Its microtube holder has alphanumeric grid for easy retrieval of the microtubes. Microtube Combo Rack has a transparent hinged lid with a latch