The Heli DW-86L58 Ultra Low Temperature upright Freezer is a small but robust unit that combines a reliable cooling system together with a unique door sealing system (perfect fit system®). As the -86°C freezer itself can be set accurately on the controller the most important temperature is products stability. For this reason We only chooses the most reliable components available. The reliable cooling compressors are used in a unique cascade system with very low compressor pressures and a completely sealed cooling system.