Lab-Line General Purpose Undercounter Freezers are available in two configurations. F4415-0 is a 4 cubic ft. undercounter freezer with three fixed shelves and manual defrost. External controls include an adjustable thermostat with deep freeze setting and an over-temperature warning with visual alarm. Built-in key lock for security. Suitable for -25° storage requirements. UL listed. F4415-1 is a 5.6 cubic ft. undercounter freezer with three fixed shelves and a hydraulic thermostat. Manual defrost. CFC-free insulation and coolant with both models.