This PLUS HD Ultra-Low Temperature Upright Freezer from Thermo Scientific Revco can store 70,000 2 in. sample vials in 35 inventory storage racks, it has ten inner doors to reduce sample exposure to ambient air, five shelves, three adjustable in 1 in. (25 mm) increments that allows alternate inventory configuration. ULT3280-10HD-W's sophisticated, easy-to-read microprocessor control delivers industry-leading performance to protect the integrity of your work. This unit also features a CFC-free refrigerants, PLUS Power Management System, high-strength steel construction and has many more features for a maximum safety of your valuable items in a 31.4 cu. ft. space. It meets the NEMA, UL61010-1, UL471, CUL, CE, IEC60335-2-89/Climate Class T (Tropical) criteria.