Endro Scientific's ultra-low (-50°C TO -86°C) freezers are some of the most reliable and affordable ULTs on the market. They are an ideal lab freezer for tissue sample storage or bulk vaccine cold storage. These dual compressor ULT's feature a cascade cooling system and have the power to hold temperatures around -86°C with minimal temperature fluctuation. On-board data logger Quantity: 400 boxes (2”) Door thickness: 3.54” (90mm) Dual gaskets for an air-tight seal Shelves are adjustable in 1" increments Warranty: two-year parts, labor, or full replacement Watch this short video for an overview of the Endro21ULT. Download the specifications sheet or manual.