The IC Biomedical HC20 Liquid Nitrogen Refrigerator is a 20-liter cryogenic freezer designed for storing various materials at cryogenic temperatures. The unit provides temperatures of -196ºC at the liquid surface and -190ºC at the canister top. This refrigerator features a large storage capacity with superior vacuum performance and super insulation, which provides maximum holding times. It has a new rugged construction, including a ribbed high-strength aluminum body, a magniformed necktube design, and a more durable paint finish. The refrigerator also has a convenient canister numbered index location ring and a tapered internal spider. The HC20 has a static holding time of 87 days and an evaporation rate of 0.23 liters per day. For added mobility, an optional roller base TW-R018-8C00 is available. The unit comes with six thin-gauge stainless steel canisters. The manufacturer is ICBiomedical, and it comes with a 5-year vacuum warranty.