This benchtop cooler protects enzymes, cells, reagents, and solutions by maintaining freezer temperatures while on the laboratory bench. It maintains freezer temperature during frost-free cycle, power failure, and accidental door opening. Molded of impact resistant polycarbonate (PC) with a locking handle for long term use. The compartments are non-filled and clear. Holds 20 tubes (1.0 and 1.8 ml). The printed grid on the one-way keyed lid allows for proper orientation and sample identification. Stackable to save space. Temperature Rating: -20°C. Holds Temperature: < -15°C For 1 Hour. Number Of Compartments: 4 x 5. Material: Polycarbonate (PC). Dimensions: 226 x 165 x 133mm. Nunc #: 355501.