Manufactured of strong polycarbonate, these boxes are ideal for compact storage of 2.0 or 5.0ml cryogenic vials.  Boxes can be used at temperatrues from -196°C to +121°C and are autoclavable.  Transparent lids have a numbered grid for sample identification.  Frosted surface area is suitable for writing with markers. Dimensions of cryo boxes are designed to be compatible with vertical, horizontal, and drawer style freezer racks.  66301 includes two red boxes, one blue box, and one yellow box. 66302 includes two red boxes and two blue boxes. 66303 includes an assortment of red, yellow, and blue colored boxes.