Refrigerator has a hinged, lockable, transparent top for viewing and protecting container contents. Efficient necktube insert maintains thermal performance. A large necktube opening allows the use of canisters that hold 30-40 percent more material. A high strength aluminum shell provides durability. Thermal barrier, advanced insulation and vacuum provide optimum thermal efficiency. There is also a slotted, numbered indexing handle assembly. Specimen storage canisters are provided with each refrigerator. An optional universal roller base is available. Includes 6 storage canisters. 20 liters capacity. Static hold time: 105 days. Evaporation rate: 0.19 liters/ per day. Working time: 65 days/9 weeks. 3.75" Necktube diameter. 15" Outside diameter. 25.50" Overall height. Empty weight: 23 lbs. Full weight: 60 lbs. 11" Canister length. 2.96" Canister inside diameter.